Insect Fauna of Korea Fauna Insect

Number 21

Omaliinae Ministry of Environment Volume 12, Volume National of Biological Institute Resources Flora and Fauna of Korea and Fauna Flora Arthropoda: Insecta: Coleoptera: Staphylinidae Coleoptera: Insecta: Arthropoda: Insect Fauna of Korea Fauna Insect

Insect Fauna of Korea Vol. 12, No. 21 Omaliinae NIBR

Insect Fauna of Korea

Volume 12, Number 21 Arthropoda: Insecta: Coleoptera: Staphylinidae Omaliinae

2015

National Institute of Biological Resources Ministry of Environment

Insect Fauna of Korea

Volume 12, Number 21 Arthropoda: Insecta: Coleoptera: Staphylinidae Omaliinae

Tae-Kyu Kim and Kee-Jeong Ahn Chungnam National University Insect Fauna of Korea Volume 12, Number 21 Arthropoda: Insecta: Coleoptera: Staphylinidae Omaliinae

Published by the National Institute of Biological Resources Environmental Research Complex, Hwangyeong-ro 42, Seo-gu Incheon 22689, Republic of Korea www.nibr.go.kr

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior permission of the National Institute of Biological Resources.

ISBN : 9788968112140-96470 Government Publications Registration Number 11-1480592-000998-01

Printed by Junghaengsa, Inc. in Korea on acid-free paper

Publisher : Kim, Sang-Bae Authors : Tae-Kyu Kim and Kee-Jeong Ahn Project Staff : Ki Gyoung Kim, Hong-Yul Seo and Jin Han Kim

Published on November 30, 2015

A Korean translation of this issue is simultaneously published for Korean speaking readers. This English version therefore should be regarded as an original publication that has nomenclatural priority.

The Flora and Fauna of Korea logo was designed to represent six major target groups of the project including vertebrates, invertebrates, insects, algae, fungi, and bacteria. The book cover and the logo were designed by Jee-Yeon Koo. Chlorococcales: 1

Preface

The biological resources include all the composition of organisms and genetic resources which possess the practical and potential values essential to human live. Biological resources will be firmed competition of the nation because they will be used as fundamental sources to make highly valued products such as new lines or varieties, new material, and drugs. As the Nagoya Protocol th was adopted in 2010 and entered into force in the 12 Conference of Parties of the Convention on

Biological Diversity (CBD) in 2014, it is expected that the competition to get biological resources will be much intensive under the rapidly changed circumstance on the access and benefic sharing of the genetic resources (ABS). Therefore, each nation is investigating and clearing information of native species within its territory in order to secure its sovereignty rights over biological resources. The National Institute of Biological Resources of the Ministry of Environment has been publishing the ‘Flora and Fauna of Korea’ since 2006 to manage biological resources in comprehensive ways and to enhance national competitiveness by building up the foundation for the sovereignty over biological resources. Professional research groups consisting of professors and related experts of taxonomy examined systematically a total of 12,631 species for the past eight years to publish 151 volumes in both Korean and English versions, and two volumes of World Monograph covering 216 species. This year, 11 volumes of the Flora and Fauna of Korea each in Korean and English versions including 517 species of invertebrates, insects, vascular plants, algae and fungi are addi- tionally published. Flora and Fauna of Korea were the first professional records to describe all the species of the nation in a comprehensive way, and they would contribute to level up the taxonomic capacity. Furthermore, publication of flora and fauna through identification of native species and investigation of national biota would be helpful to declare sovereignty rights over our native biological resources, be used as positive proof, and be utilized to provide the basic information of biological resources for industrial application. The National Institute of Biological Resources of the Ministry of Environment will continue to accelerate the project of the publication of the ‘Flora and Fauna of Korea’. Personally I would like to express my sincere appreciation for Dr. Tae-Kyu Kim and Professor Kee-Jeong Ahn of Chung nam National University who have continuously made a lot of efforts to publish an excellent version of Korean fauna.

Sang-Bae Kim President National Institute of Biological Resources

Chlorococcales: 1

Contents

List of Taxa 2 Introduction 4 Materials and Methods 7 Taxonomic Notes 9

1. Acidota crenata (Fabricius) 10 2. Camioleum choi Shin and Ahn 11 3. Geodromicus abdominalis Zerche 13

4. Geodromicus (Geodromicus) beibienkoi Tikhomirova 14

5. Geodromicus (Geodromicus) caliginosus (Sharp) 15

6. Geodromicus (Geodromicus) kirchenblati Tikhomirova 15

7. Geodromicus (Geodromicus) lestevoides (Sharp) 16 8. Lesteva cordicollis Motschulsky 17 9. Lesteva coreana Kim and Ahn 18 10. Lesteva distincta Watanabe 19 11. Lesteva miyabi Watanabe 20 12. Lesteva okiana Watanabe 21 13. Olophrum mutatum Scheerpeltz 22 14. Trigonodemus koreanus Kim and Ahn 23 15. Uenohadesina styx Smetana 25 16. Archaeoboreaphilus macrothorax Kim and Ahn 27 17. Archaeoboreaphilus rubromaculatus Kim and Ahn 28 18. Boreaphilus graciliformis Zerche 30 19. Boreaphilus japonicus Sharp 30 20. Boreaphilus temporalis Zerche 31 21. Eudectus japonicus Zerche 33 22. Eudectus rufulus Weise 34

23. Eusphalerum (Eusphalerum) delyi Zanetti 36

24. Eusphalerum (Eusphalerum) mahunkai Zanetti 37

25. Eusphalerum (Eusphalerum) merkli Zanetti 38

26. Eusphalerum (Eusphalerum) reitteri (Bernhauer) 39

27. Eusphalerum (Eusphalerum) steinmanni Zanetti 39

28. Eusphalerum (Eusphalerum) szeli Zanetti 40 29. Acruliopsis ussuriensis Zerche 41 30. Omalium japonicum Sharp 43 Literature Cited 45 Plates 50 Index to Scientific Names 70 2 Insect Fauna of Korea·Omaliinae

List of Taxa

Class Insecta Linnaeus, 1758 Order Coleoptera Linnaeus, 1758 Family Staphylinidae Latreille, 1802 Subfamily Omaliinae MacLeay, 1825 Tribe Anthophagini Thomson, 1859 Genus Acidota Stephens, 1829

Acidota crenata (Fabricius, 1793) Genus Camioleum Lewis, 1893 Camioleum choi Shin and Ahn, 2006 Genus Geodromicus Redtenbacher, 1857 Geodromicus abdominalis Zerche, 2003

Geodromicus (Geodromicus) beibienkoi Tikhomirova, 1973

Geodromicus (Geodromicus) caliginosus (Sharp, 1889)

Geodromicus (Geodromicus) kirchenblati Tikhomirova, 1973

Geodromicus (Geodromicus) lestevoides (Sharp, 1889) Genus Lesteva Latreille, 1797 Lesteva cordicollis Motschulsky, 1860 Lesteva coreana Kim and Ahn, 2011 Lesteva distincta Watanabe, 1990 Lesteva miyabi Watanabe, 1990 Lesteva okiana Watanabe, 2004 Genus Olophrum Erichson, 1839 Olophrum mutatum Scheerpeltz, 1929 Genus Trigonodemus LeConte, 1863 Trigonodemus koreanus Kim and Ahn, 2008 Genus Uenohadesina Smetana, 2000 Uenohadesina styx Smetana, 2000 Tribe Coryphiini Jakobson, 1908 Subtribe Boreaphilina Zerche, 1990 Genus Archaeoboreaphilus Zerche, 1990 Archaeoboreaphilus macrothorax Kim and Ahn, 2012 Archaeoboreaphilus rubromaculatus Kim and Ahn, 2012 Genus Boreaphilus Sahlberg, 1832 Boreaphilus graciliformis Zerche, 1990 Boreaphilus japonicus Sharp, 1874 Boreaphilus temporalis Zerche, 1990 Subtribe Coryphiina Jakobson, 1908 Genus Eudectus Redtenbacher, 1857 Eudectus japonicus Zerche, 1990 Eudectus rufulus Weise, 1877 Tribe Eusphalerini Hatch, 1957 Genus Eusphalerum Kraatz, 1857 List of Taxa 3

Eusphalerum (Eusphalerum) delyi Zanetti, 1993

Eusphalerum (Eusphalerum) mahunkai Zanetti, 1993

Eusphalerum (Eusphalerum) merkli Zanetti, 1993

Eusphalerum (Eusphalerum) reitteri (Bernhauer, 1935)

Eusphalerum (Eusphalerum) steinmanni Zanetti, 1993

Eusphalerum (Eusphalerum) szeli Zanetti, 1993 Tribe Omaliini MacLeay, 1825 Genus Acruliopsis Zerche, 2003 Acruliopsis ussuriensis Zerche, 2003 Genus Omalium Gravenhorst, 1802 Omalium japonicum Sharp, 1874 4 Insect Fauna of Korea·Omaliinae

Introduction

The Omaliinae MacLeay containing about 1396 species in 117 genera occur worldwide (Newton et al., 2000; Thayer, 2005). They are found in various habitats such as forest litter, stream edges, moss, snowfield edges (Coryphiini), seacoasts (Omaliini and Aphaenostemmini), animal materials, mammal burrows or bird nests (Omaliini), flowers (Eusphalerini and some Anthophagini), mush- rooms, and others (Fig. 1) (Steel, 1970; Klimaszewski et al., 1996; Newton and Thayer, 1995; New- ton et al., 2000; Frank and Ahn, 2011). Little is known on the biology of the Omaliinae. Most species are predators as adults and larvae; but some appear to be pollen-feeders (Eusphalerini, some

Omaliini and Anthophagini), mycophagous (possibly in Omaliini) and saprophagous (possibly in

Omaliini and Aphaenostemmini) (Thayer, 2005). Welch (1993) studied ovaries of Staphylinidae and arranged them as ten types. The Omaliinae included five types (C, E, F, H, and K) and showed high diversity in ovarian structure (Newton and Thayer, 1995). Members of the Omaliinae are distinguished by the combination of the following characters: in adult, body broad and flat generally, with less flexible abdomen; antenna inserted under lateral margin of frons; dorsal tentorial arm generally present; pair of ocelli usually present near vertex; epistomal suture absent; hypomeron well developed and prothoracic spiracle concealed; procoxa prominent and conical; metacoxa transverse; tarsal formula 5-5-5; abdomen with pair of paratergites; abdominal segments III-VIII with functional spiracles; intersegmental membranes with brickwall-like pattern; anterior projection of sternite VIII well developed, associated with defensive gland; in larvae, labrum separated; mandible with one apical tooth; five pairs of stemmata present

(usually); each abdominal segment with two paired lateral sclerites; urogomphi one articled (New- ton and Thayer, 1995; Newton et al., 2000; Thayer, 2005). The Omaliinae had been classified as a subcategory within “Brachelytra” possessing short elytra and unique wing-folding pattern (MacLeay, 1825; Mannerheim, 1830; Lawrence and Newton, 1982).

In the early years, the tribe Omaliina (now Omaliinae) included three subgroups, Anthophagides,

Omaliides, and Proteinides (Thomson, 1859). Anthobiates (now Eusphalerini) and Coryphiina

(now Coryphiini) were placed within the Omaliinae by Mulsant and Rey (1880) and Jakobson

(1908). Portevin (1929) classified them into six tribes [Anthophagini, Anthobiini (now Eusphaleri- ni), Coryphiini, Hadrognathini, Micralymmini, and Omaliini]. The genus Brathinus LeConte was originally placed within the Silphidae or often placed in a separate family; but now belongs to the omaliine tribe Anthophagini (Hammond, 1971), supported by the characteristics of larvae (Thayer, 1985). The genera Glypholoma Jeannel and Microsilpha Broun were transferred from Silphidae to

Omaliinae (Newton, 1975, 1985). Later, the tribe Aphaenostemmini Peyerimhoff was placed within

Omaliinae, although it had been originally placed near Omaliinae with subfamily status (Newton and Thayer, 1992) and three tribes, Arpediomimini, Micralymmini, and Tetradelini, were synony mized under the tribe Omaliini. Finally, Newton and Thayer (1995) classified the Omaliinae as sev- en tribes (Anthophagini, Aphaenostemmini, Corneolabiini, Coryphiini, Eusphalerini, Hadrognathi- ni, and Omaliini).

Geodromicus lestevoides (Sharp) was the first Korean Omaliinae species reported by Watanabe

(1969). Later, Yuh et al. (1985) recorded two species, Acidota crenata crenata (Fabricius), and Geodrom- icus caliginosus (Sharp) for the Korean fauna. Zanetti (1993) described five new Eusphalerum species from North Korea (E. delyi, E. mahunkai, E. merkli, E. steinmanni, and E. szeli) and added E. reitteri (Bernhauer) as a new record in the same paper. The monotypic genus Uenohadesina was described Introduction 5

by Smetana (2000) and it is troglobiontic and endemic to the Korean fauna. Subsequently, Cho et al. (2002) added Lesteva plagiata Sharp and Cho et al. (2003) two more Geodromicus species, G. hermani (Watanabe) and G. sibiricus Bernhauer. In the same year, Shin and Ahn (2003) recorded Boreaph- ilus graciliformis Zerche and B. japonicus Sharp, and they described a new species, Camioleum choi

Shin and Ahn in Korea (Shin and Ahn, 2006).

Furthermore, Kim and Ahn (2008, 2011, 2012, 2014a, 2014b) and Kim et al. (2008) described four new species and added new records of nine additional species in South Korea. To date, the Korean Omaliinae include 26 species in 13 genera. In this review, 30 Korean species in the Korean Peninsu- la are recognized, including four new records (Geodromicus kirchenblati Tikhomirova, Lesteva okiana Watanabe, Olophrum mutatum Scheerpeltz, and Boreaphilus temporalis Zerche) in the Korean peninsula and four Eusphalerum species in South Korea. 6 Insect Fauna of Korea·Omaliinae

A B

C D

E F

G H

Fig. 1. Various habitats of Omaliinae. A. stream edges; B. Boreaphilus sp. on snow © Eui-Young Kang; C. Eusphalerum sp. on flowers, © Kee-Jeong Ahn; D. beach, © In-Seong Yoo; E. decaying materials; F. manure; G. under bark; H. fungus on log, © Dae-Hyun Lee. Chlorococcales: 7

Materials and Methods

Most of the materials examined for this work were collected during our fieldwork from 1997 to

2014 and deposited in Chungnam National University Insect Collection (CNUIC), Daejeon, Korea. For more reliable identifications, we borrowed specimens including a series of types from the following institutions: Field Museum of Natural History (FMNH), Chicago; Laboratory of Entomol- ogy, Tokyo University of Agriculture, Tokyo; National Museum of Nature and Science (NMNS),

Tokyo; Natural History Museum of Hannam University (HUNHM), Daejeon; Osaka Museum of

Natural History, Osaka; Senckenberg Deutsches Entomologisches Institut (SDEI), Müncheberg,

Germany; The Natural History Museum (NHM), London.

The terms used here basically follows Blackwelder (1936) but followed Newton and Thayer (1995), and Newton et al. (2000) in some cases. We used Roman numerals for segments of tagmata and Arabic numerals for articles of appendages. Permanent microscope slides were prepared using the techniques described by Hanley and Ashe (2003). All habitus photographs were prepared from single or multi-layered shots taken with a Nikon

D300 digital camera or Olympus DP-71 attached dissecting microscope (Olympus SZX16). The dif- ferent layers of photos were combined by Helicon Focus 6 (Helicon Soft, Kharkov, Ukraine), and were modified by Photoshop CS4 (Adobe, San Jose, CA, USA). Most drawings were made using an Olympus BX-51 compound microscope with a drawing tube.

The arrangement and concept of subtribes are those of Newton and Thayer (1995), Newton et al.

(2000) and Bouchard et al. (2011). The listings of names of species within genera, genera within subtribes, and subtribes within tribes are alphabetical. Diagnoses of higher taxa are based only on Korean specimens and some literature. Therefore, we provide detailed description of adults of the species although there is some redundancy of characters. Following abbreviations are used in the description part: L (length) and W (width). When we write that species ‘a’ is very similar to species ‘b’, we mean that adults of the two species are very similar. Primary distributional entries are pro- vided according to the names of countries where each species is found. Korea is listed first, and eastern Asian countries alphabetically, and then all other countries alphabetically as well. Second- ary entries (if any) are the subunits of large countries such as China and Russia. 8 Insect Fauna of Korea·Omaliinae

Acknowledgments

We thank Y.B. Cho (HUNHM), R.G. Booth (NHM), L. Zerche and S.M. Blank (SDEI), M. Thay- er and J.H. Boone (FMNH), S. Nomura (NMNS), S. Shiyake (Osaka Museum of Natural Histo- ry), and Y. Watanabe (Tokyo University of Agriculture) for the loan of specimens including many type series. The draft manuscript was read throughout by Howard Frank (University of Florida,

Gainesville), and in various parts by Y.-H. Kim (CNUIC). Their numerous corrections and sug- gestions significantly improved the revision. Also, we are grateful to the CNUIC members for sharing their interests and passion for Korean beetles. The following figures were published in various journals: 2K, L, 18A-F, 19A-G and 20A-G (Animal Systematics, Evolution and Diversity);

2E, F, 14A-L and 15A-H (Korean Journal of Applied Entomology); 1B-D, 3A-E and 4A-E (Ca- nadian Entomologist); 1F-I, 5A-G, 6A-E, 7A-F and 8A-F (Florida Entomologist); 1K and 10A-

H (Journal of The Kansas Entomological Society); 1A (Magnolia Press, Zootaxa). Taylor & Fran- cis granted us permission to re-use figures (1L, 2A, 11A-I and 12A-H) from Journal of Natural

History, 46: 2509-2517 (http://www.tandfonline.com/doi/full/10.1080/00222933.2012.707242). The study on the discovery of four new records in the Korean peninsula and four additions to the

South Korean fauna was supported by a grant from the National Institute of Biological Resources

(NIBR), funded by the Ministry of Environment (MOE) of the Republic of Korea (NIBR No. 2014 01203). This research would not have been possible without the continued support of the NIBR and staff. Coleoptera: Staphylinidae: Camioleum 9

Taxonomic Notes

Class Insecta

Order Coleoptera

Family Staphylinidae

Subfamily Omaliinae MacLeay, 1825

Omalidae MacLeay, 1825: 49 (incorrect original spelling). Omaliinae: Eichelbaum, 1909: 96; Crowson, 1955: 33; Hatch, 1957: 48; Thayer, 1987: 400; Zanetti, 1987: 1; Watanabe, 1990: 62; Zerche, 1990: 12; Newton and Thayer, 1992: 13; 1995: 247; Dettner, 1987: 28; Lawrence and Newton, 1995: 824; Downie and Arnett, 1996: 429; Newton et al., 2000: 335. Omalides Mannerheim, 1830: 9. Homalioidae Agassiz, 1847: 184. Type genus: Omalium Gravenhorst.

Distribution: About 1,400 species worldwide including 30 species in Korea.

Key to the tribe of the subfamily Omaliinae (modified from Watanabe, 1990)

1. Hind tarsomere 5 shorter than basal four combined; spermatheca absent ······································· 2 - Hind tarsomere 5 as long as or longer than basal four combined; spermatheca present ··············· 3 2. ‌Maxillary palpomere 3 not expanded, palpomere 4 as wide as or slightly narrower than palpomere 3 ······························································································································· Anthophagini - ‌Maxillary palpomere 3 expanded strongly, palpomere 4 needle-like, much narrower than palpomere 3 ···································································································································· Coryphiini 3. ‌Antennomeres 9-10 quadrate; molar and scissorial area fused; basal four tarsomeres wide and short, long and dense setae present on ventral surface ··················································· Eusphalerini - ‌Antennomeres 9-10 transverse; molar and scissorial area separated; basal four tarsomeres somewhat narrow, long and dense setae absent on ventral surface ·············································· Omaliini 10 Insect Fauna of Korea·Omaliinae

Tribe Anthophagini Thomson, 1859

Anthophagides Thomson, 1859: 48. Anthophagini: Hatch, 1957: 52; Newton et al., 2000: 338. Brathinidae LeConte, 1861: 52; Hammond, 1971: 63; Newton and Thayer, 1992: 57. Lestévates Mulsant and Rey, 1880: 8. Lestevina Jakobson, 1908: 445. Type genus: Anthophagus Gravenhorst, 1802. 15 species in 7 genera recorded in Korea.

Key to the genus of the tribe Anthophagini

1. ‌Mandible edentate or with just small tooth; maxillary palpomere 4 as wide as and longer than 3 ··· ······································································································································································· 2 - ‌Mandible with two conspicuous teeth around apical fourth, right mandible with small tooth near middle; maxillary palpomere 4 narrower and shorter than 3 ································· Geodromicus

2. ‌Elytra flat or weakly convex, covering anterior part of abdomen (at least apical three segments exposed) ······················································································································································· 3 - ‌Elytra strongly convex and very long, covering almost whole abdomen ········································· 5 3. ‌Maxillary palpomere 3 wider than long; 4 more than 3.0 times as long as 3; labial palpomere 2 longer than wide; mesoventrite with median carina ·································································· Lesteva - ‌Maxillary palpomere 3 longer than wide; 4 less than 2.0 times as long as 3; labial palpomere 2 wider than long; mesoventrite without median carina ········································································ 4 4. ‌Abdomen punctate more or less coarsely ···················································································· Acidota - ‌Abdomen impunctate but covered with microsculpture ······················································ Olophrum 5. ‌Eye small; temple almost 3.0 times as long as eye; ocelli absent; pronotum and elytra covered with minute punctures ········································································································· Uenohadesina - ‌Eye large and prominent; temple shorter than eye; ocelli distinctly present; pronotum and elytra covered with coarse punctures ················································································································ 6 6. ‌Head wider than long; pronotum widest near middle; mesoventrite without median carina; mesocoxal cavities contiguous ····································································································· Camioleum - ‌Head longer than wide; pronotum widest at posterior margin; mesoventrite with median carina; mesocoxal cavities separated ······························································································ Trigonodemus

Genus Acidota Stephens, 1829

Acidota Stephens, 1829: 25; Hatch, 1957: 68; Zanetti, 1987: 319; Watanabe, 1990: 141; Downie and Arnett, 1996: 434; Newton et al., 2000: 338. Type species: Staphylinus crenatus Fabricius, 1793. 1 species recorded in Korea.

1. Acidota crenata (Fabricius, 1793)

Staphylinus crenatus Fabricius, 1793: 525. Coleoptera: Staphylinidae: Camioleum 11

Acidota crenata: Mannerheim, 1830: 55; Steel, 1970: 20; Shibata, 1976: 111; Yuh et al., 1985: 255; Zanet- ti, 1987: 320; Ryabukhin, 1999: 27; Herman, 2001: 214. Omalium rufum Gravenhorst, 1802: 115. Omalium castaneum Gravenhorst, 1806: 207. Acidota pulchra Motschulsky, 1857: 493. Acidota seriata LeConte, 1863: 55.

Distribution: Korea (South), Japan, Russia (Far East, Siberia), Mongolia, Europe, Nearctic Re- gion.

Remarks: We could not find specimens but cited this species based on Yuh et al. (1985).

Genus Camioleum Lewis, 1893

Camioleum Lewis, 1893: 394; Hammond, 1971: 69; Smetana, 1985: 301; Watanabe, 1990: 116. Type species: Camioleum loripes Lewis, 1893. 1 species recorded in Korea.

Diagnosis: Body suboval and more or less broad; head subpentagonal transversely, more or less depressed above; eye large and protruding with surrounding ocular ridge; ocelli distinct; gular sutures slightly separated and divergent posteriorly; antenna elongate, all antennomeres longer than wide; molar area of mandible separated with scissorial area; maxillary palpomere 4 much longer than wide, almost as wide as and about 2.0 times as long as 3; mentum trapezoidal transversely, long seta present on just inner anterior angles; pronotum gently convex medially and deplanate laterally, coarsely punctate, widest around middle; elytra suboval, medial area convex but lateral area deplanate narrowly along lateral margin; covering almost whole abdomen except for apical one or two segments, covered with striated coarse punctures; mesocoxal cavities contiguous; abdominal tergite VII with apical palisade fringe.

2. Camioleum choi Shin and Ahn, 2006 (Pl. 1A)

Camioleum choi Shin and Ahn, 2006: 58.

Description: Body length 3.5-3.7 mm (head to abdominal end). Body brown and lustrous, antennomeres 6-11 dark brown, abdomen black except apical antennomeres. Head covered with scattered punctures, frons and medial region of vertex impunctate, about 1.4 times as wide as long; eye about 2.2 times as long as temple; distance between ocelli about 2.0 times as long as distance between outside of ocellus and inner margin of eye. Antenna reaching to anterior fourth of elytra, more or less incrassate distally, basal five antennomeres lustrous and remainder lusterless; scape robust, about 2.0 times as long as wide; pedicel about 1.8 times as long as wide, slightly shorter and about 0.75 times as narrow as scape; antennomere 3 slender and slightly dilated apically, about 2.5 times as long as wide, about 1.3 times as long as and slight narrower than pedicel; 4-7 almost equal in length and shape, about 2.0 times as long as wide; 8-10 slightly decreasing in length but increasing in width; 8 about 1.6 times as long as wide; 10 about 1.2 times as long as wide; 11 lon- 12 Insect Fauna of Korea·Omaliinae gest, about 1.7 times as long as wide, about 1.5 times as long as 10 but almost same in width. Pro- notum convex medially but depressed along midline with V-shaped depression around posterior half; lateral margin crenulate; anterior and posterior margins almost same in length, anterior margin broadly and weakly emarginate, posterior margin almost straight; anterior angles more or less rounded and posterior ones angular; scutellum subtriangular, covered with several fine punctures; lateral margin of elytra weakly serrate in anterior fourth; metaventrite more or less broad, covered with punctures, getting coarser laterally. Abdomen more or less broad but narrowed apically; basal three tergites less sclerotized; pair of ovate patches of wing-folding spicules present on posterior part of tergites V-VII, patches of tergite V smaller than others. Male. Lateral part of pronotum weakly and more or less narrowly deplanate; lateral margin of pronotum weakly crenulate. Profemur more or less expanded medially; pro- and mesotrochanters with peg setae; pro- and mesofemora with several peg setae on ventral surface near medial region; pro- and mesotibiae weakly incurved; basal two third of protibia excavated ventrally, projection present in apical third on ventral region, anterior margin of ventral excavation with several short peg setae arranged longitudinally; meso- and metatibiae with short peg setae arranged in apical two thirds of ventral surface; tarsi more or less broad; abdominal tergite VIII with truncate apical margin; sternite VIII with subtriangular posterior margin. Aedeagus: median lobe long and divid- ed into three lobes, middle lobe constricted in apical third with more or less acute apex, each lateral lobe bent to opposite side. Paramere slender and long, slightly longer than middle lobe of median lobe. Female. Lateral part of pronotum strongly and broadly deplanate; lateral margin of pronotum more or less strongly crenulate; all legs without peg setae, pro- and mesotibiae straight; abdominal tergite VIII with prolonged apex; sternite VIII with numerous setae.

Specimens examined: Holotype, ♂: ‘KOREA: Gangwon Prov., Pyeongchang-gun, Jinbu-myeon, Dongsan-ri, Mt. Odaesan, Sangwonsa, 4.vi.2001, S.-J. Park, ex sifting; Holotype, Camioleum choi Shin & Ahn, 2006.’ Deposited in CNUIC, Daejeon; Paratypes, 1♂2♀♀, Deposited in CNUIC, Daejeon; 1♂, same data as holotype; Holotype, Camioleum choi Shin & Ahn, 2006.’ Deposited in CNUIC, Daejeon; Paratypes, 1♂2♀♀, Deposited in CNUIC, Daejeon; 1♂, same data as holotype; 1♀, same data as holotype except for 30.iv-4.vi.2001, K.-J. Ahn, S.-J. Park, M.-S. Kim, M.-J. Jeon, ex FIT; 1♀, same data as holotype except for Jinbu-myeon, Mt. Odaesan, Sangwonsa, 8-25.v.2004, S.J. Park, D.H. Lee, J.S. Park, ex FIT. KOREA: Gangwon Prov., Hongchun-gun, Nae-myeon, Mt. Gyebangsan, Un- duryeong, N37°42′49.9″ E128°26′40.5″ 1100 m, 10.v-20.vi.2007, T.K. Kim, Y.H. Kim, D.H. Lee, H.W.

Lee, FIT (1♂ in EtOH, CNUIC); Unduryeong, N37°42′49.4″ E128°26′39.4″ 1155 m, 2.vi.2009, J.H.

Song, sifting, leaf litter near wet land (1♂ in EtOH, CNUIC); Inje-gun, Girin-myeon, Bangdong-ri, Bangtaesan-recreation forest, N37°55′48.7″ E128°23′16.2″ 621 m, 30.v.2009, Y.H. Kim, sifting, leaf litter near stream (1♂ in EtOH, CNUIC); Pyeongchang-gun, Jinbu-myeon, Dongsan-ri, Mt. Odaesan, Sangwonsa, N37°43′48.9″ E128°35′17.8″ 890 m, 10.v-21.vi.2007, T.K. Kim, Y.H. Kim, D.H. Lee, H.W.

Lee, FIT (1♂ in EtOH, CNUIC); Pyengchang-gun, Mt. Odae, N37°47′03″ E128°33′ 55″, 18.vi.2004, S.J.

Park, ex sifting (1♂, CNUIC).

Distribution: Korea (South). Coleoptera: Staphylinidae: Geodromicus 13

Genus Geodromicus Redtenbacher, 1857

Geodromicus Redtenbacher, 1857: 244; Hatch, 1957: 69; Newton et al., 2000: 339; Kim et al., 2008: 641. Psephidonus Gistel, 1856: 29; Zanetti, 1987: 370; Watanabe, 1990: 265; Downie and Arnett, 1996: 434. Type species: Staphylinus plagiatus Fabricius, 1798. 5 species recorded in Korea.

Diagnosis: Body broadly spindle-shaped, densely pubescent, covered with punctures. Head subquadrate, with large convex eyes and distinct subocular ridge. Antenna filiform. Mandible subtriangular, with two distinct internal teeth; maxillary palpomere 4 more than 1/3 of palpomere 3 in length, and thinner than palpomere 3. Pronotum convex, wider than head, widest at about anterior third or near middle, more strongly narrowed posteriorly than anteriorly. Elytra flat, broader than pronotum, expanded posteriorly. Legs long and slender. Abdomen broad, flat, and abruptly narrowed posteriorly.

Key to the species of the genus Geodromicus

1. Elytra bicolored ······················································································································ G. lestevoides - Elytra unicolored ········································································································································ 2 2. ‌Femora brown to dark brown; male profemur not expanded, less than 2.3 times as wide as tibia; pronotum widest at anterior third ··················································································· G. kirschenblati - ‌Femora dark brown to black; male profemur expanded, more than 2.5 times as wide as tibia; pronotum widest near middle ················································································································· 3

3. ‌Fore body length 4.8-5.5 mm (head to elytra); male protarsomeres 1-4 bilobed; elytra very long; male sternite VIII with pair of postero-lateral projections conspicuous, with thorny setae; paramere slightly longer than median lobe ················································································ G. abdominalis

- ‌Fore body length 3.2-4.0 mm (head to elytra); male protarsomeres 1-4 not bilobed; elytra short; male sternite VIII with pair of postero-lateral projections inconspicuous, without thorny setae; paramere shorter than median lobe ····················································································· G. beibienkoi

3. Geodromicus abdominalis Zerche, 2003 (Pls. 1B, 3A-E)

Geodromicus abdominalis Zerche, 2003a: 285; Kim et al., 2008: 645.

Description: Fore body length 4.8-5.5 mm (head to end of elytra). Body covered with coarse punctures and long setae. Head about 1.1 times as wide as long (width=between temples; length= from clypeus), V-shaped depression present between antennae, U-shaped depression around ocelli. Eye about 1.7 times as long as temple. Antenna almost reaching end of elytra; all antennomeres longer than wide. Pronotum moderately convex with coarse punctures; widest near middle, about 1.4 times as wide as head and about 1.5 times as long as head; lateral margin arcuate in anterior five sixths but almost straight in posterior sixth; median longitudinal furrow present from anterior fourth to basal area of disc. Male. Profemur expanded, more than 2.0 times as wide as tibiae; basal four protarsomeres bilob ed. Abdominal tergite IV with pair of patches of wing-folding spicules. Posterior margin of abdo minal sternite VIII with V-shaped medial emargination bordered laterally by pair of triangular pro- 14 Insect Fauna of Korea·Omaliinae jections bearing thornlike setae. Aedeagus: median lobe elongate; apical part spade shaped, with postero-lateral projection; each lateral margin semi-translucent; paramere slender, slightly longer than median lobe; each paramere with four setae, three at apex.

Specimens examined: KOREA: Gangwon Province: Sokcho City, Mt. Seoraksan, 26.viii.1996, P.

Tripotin, near stream (1♂1♀, CNUIC); Pyeongchang-gun, Jinbu-myeon, Mt. Odaesan, 14.viii.1995,

P. Tripotin (1♂2♀♀, CNUIC); Mt. Odaesan, Woljeongsa, 23.viii.2000, K.-J. Ahn, near stream (1♂, CNUIC).

Distribution: Korea (South), Russia (Far East).

4. Geodromicus (Geodromicus) beibienkoi Tikhomirova, 1973 (Pls. 1C, 4A-4C)

Geodromicus beibienkoi Tikhomirova, 1973b: 156; Herman, 2001: 291; Zerche, 2003a: 284; Kim et al., 2008: 642.

Geodromicus (Geodromicus) beibienkoi: Kashcheev, 1999: 16; Smetana, 2004: 243.

Geodromicus hermani: Cho et al., 2003: 142 [Misidentification].

Diagnosis: Fore body length 3.2-4.0 mm (head to end of elytra). Body covered with fine punctures and pubescence. Body black and glossy, mouthparts, antennae and legs dark brown. Head about 1.4 times as wide as long, eye about 1.4 times as long as temple. Antenna pubescent, reaching middle of elytra. Pronotum about 1.2 times as wide as head, widest near middle, with a longitudinal depression in apical third. Male profemur expanded, more than 2.5 times as wide as tibiae. Male protarsomere 4 not bilobed. Male sternite VIII with pair of inconspicuous postero-lateral projections. Median lobe of aedeagus elongate, apical part spade-shaped. Paramere slender, shorter than median lobe, with three setae at apex.

Specimens examined: KOREA: Gangwon Prov.: Chuncheon-city, Gajang-ri, 20.v.2001, S.I. Lee

(1♀, CNUIC); Sokcho City, Mt. Seolaksan, Osaekyaksu, 15.xi.2002, S.J. Park, C.W. Shin, near stream (2♂♂1♀, CNUIC); Gyeongggi Prov.: Namyangju City, Sudong-myeon, Oibang-ri, Mt. Chukry- ongsan, 13.ix.1999, H.J. Kim, near stream (8♂♂1♀, CNUIC); Chungnam Prov.: Mt. Gyeryongsan,

Geumsubong, 21.v.2000, S.J. Park, near stream (6♂♂14♀♀, CNUIC); Geumsubong, 23.ix.2001, S.J.

Park, near stream (2♂♂4♀♀, CNUIC); Geumsubong, 3.v.2003, J.S. Park, near stream (2♂♂2♀♀,

CNUIC); Mt. Gyeryongsan, Eunsun-fall, 19.v.2006, S.J. Park, S.I. Lee, under stone (12♂♂13♀♀,

CNUIC); Gongju City, Banpo-myeon, Sangsin-ri, 21.v.2000, M.S. Kim, near stream (1♀, CNUIC);

Sangsin-ri, N36°22′3″ E127°12′50″, 20.v.2006, T.K. Kim, near stream (2♂♂4♀♀, CNUIC); Mt. Chil- gabsan, Janggoksa, 14.v.1996, Y.B. Cho (1♂1♀, CNUIC); Daejeon City, Sutong-gol, 9.v.1998, K.R.

You, H.J. Lim, H.J. Kim, near stream (2♂♂4♀♀, CNUIC); 5.ix.1998, S.J. Baek (1♂3♀♀, CNUIC);

26.iv.2003, J.S. Park, S.M. Choi, near stream (3♂♂2♀♀, CNUIC); Jeonbuk Prov.: Mt. Deokyu- san, Chilyeon-fall, 23.v.1998, K.-J. Ahn, near stream (1♂1♀, CNUIC); Mt. Deokyusan, N35°50′35″

E127°41′32″ 353 m, 27.v.2005, J.S. Park, S.I. Lee, T.K. Kim, D.M. Lee, under stone (1♀, CNUIC); Jeonnam Prov.: Haenam-gun, Samsan-myeon, Gurim-ri, Mt. Durynsan, 46 m, 20.v.2005, S.I. Lee,

J.S. Park (1♂, CNUIC); Jangseong-gun, Bukha-myeon, Mt. Naejangsan, N35°27′43″ E126°50′2″, Coleoptera: Staphylinidae: Geodromicus 15

27.ix.2006, T.K. Kim, near stream (1♂, CNUIC); Gyeongbuk Prov.: Cheongsong-gun, Budong-myeon, Mt. Juwangsan, Jusan-pond, N36°21.814′ E129°11.137′, 14.vi.2006, T.K. Kim, under stone near stream (1♀, CNUIC); Gyeongnam Prov.: Sacheon City, Mt. Waryongsan, 20.v.1985, G.S. Lee (1♂

2♀♀, CNUIC); 20.v.1986, G.S. Lee (1♂, CNUIC); Jeju Prov.: Seoguipo City, 29.xi.1984, ?, cow dung (1♀, CNUIC); Namjeju-gun, Namwon-eup, Dongsuak, 23.v.2006, S.I. Lee, Y.H. Kim, under stone near stream (2♂♂1♀, CNUIC); Seojung-stream, 8.xi.2006, T.K. Kim, near stream (1♂, CNUIC).

Distribution: Korea (South), China (Northeast), Russia (Far East).

5. Geodromicus (Geodromicus) caliginosus (Sharp, 1889)

Anthophagus caliginosus Sharp, 1889: 470. Geodromicus caliginosus: Scheerpeltz, 1933: 1065; Herman, 2001: 292. Psephidonus caliginosus: Nakane, 1971: 83; Yuh et al., 1985: 225; Watanabe, 1990: 288.

Geodromicus (Geodromicus) caliginosus: Smetana, 2004: 243.

Distribution: Korea (South), Japan.

Remarks: We could not find specimens but cited this species based on Yuh et al. (1985).

6. Geodromicus (Geodromicus) kirchenblati Tikhomirova, 1973 (Pls. 1D, 4E)

Geodromicus kirschenblati Tikhomirova, 1973b: 155; Zerche, 2003a: 282. Psephidonus iburinus Watanabe, 1990: 278; Zerche, 2003a: 282.

Geodromicus (Geodromicus) kirschenblati: Smetana, 2004: 243.

Geodromicus nipponensis: Cho et al., 2003: 142 [Misidentification].

Geodromicus sibiricus: Kim et al., 2008: 647 [Misidentification].

Diagnosis: Fore body length 2.9-3.3 mm (head to end of elytra). Body covered with coarse punctures and fine setae. Body black and glossy, mouthparts, antenna and femora brown to dark brown. Head about 1.3 times as wide as long, eye about 1.8 times as long as temple. Pronotum convex, about 1.3 times as wide as head, widest at anterior third, short depression present posteriorly. Paramere slender, shorter than median lobe, with four setae at apex.

Specimens examined: KOREA: Gangwon Prov.: Jeongseon-gun, Jeongseon-eup, Yongtan-ri, Cave

Gyeonggeomsangul, 8.v.1999 (2♂♂, CNUIC); Yeongwol-gun, Yeongwol-eup, Munsan-ri, Cave

Gaegurigul, 10.vii.1999 (1♀, CNUIC); SSangyong, 18.v.2006, J.C. Son (1♂2♀♀, CNUIC); Cave Su- dalgul, 10.vii.1999 (5♂♂5♀♀, CNUIC); Palgoiri, 18.v.2006, Y.B. Lee (4♂♂1♀, CNUIC); Pyeong chang-gun, Jinbu-myeon, Sangjinbu-ri, 16.v.2006, S.J. Park, H.W. Kim, ex near stream (1♀, CNUIC).

Distribution: Korea (South), Japan, Russia (Far East). 16 Insect Fauna of Korea·Omaliinae

7. Geodromicus (Geodromicus) lestevoides (Sharp, 1889) (Pls. 1E, 4D)

Anthophagus lestevoides Sharp, 1889: 470. Psephidonus lestevoides: Nakane, 1971: 83; Watanabe, 1969: 624; 1990: 274; Yuh et al., 1985: 226; Li, 1992: 49; 1993: 19. Geodromicus lestevoides: Scheerpeltz, 1933: 1066; Herman, 2001: 297; Zerche, 2003a: 280; Kim et al., 2008: 646.

Geodromicus (Geodromicus) lestevoides: Smetana, 2004: 244.

Diagnosis: Fore body length 2.9-3.4 mm (head to end of elytra). Body covered with coarse punctures and fine setae. Body yellowish brown to dark brown and glossy, mouthparts, antennae and legs yellowish brown to reddish yellow. Head about 1.3 times as wide as long, eye about 1.4 times as long as temple. Antenna pubescent and reaching about middle of elytra. Pronotum about 1.3 times as wide as head, widest at anterior third, short longitudinal depression present on anteri- or third. Elytra as long as wide or a little longer and bicolored, each humeral region with reddish yellow patch. Abdominal paratergites IV-VII reddish yellow. Median lobe of aedeagus elongate and narrowed apically; basal part globular and curved dorsally; paramere slender, shorter than median lobe, with four setae at apex.

Specimens examined: KOREA: Gangwon Prov.: Gangreung, Namdae-dong, Namdae-stream,

21.iv.2002, S.J. Park, M.J. Jeon, J.S. Park, ex near stream (30♂♂41♀♀, CNUIC); Hongcheon-gun,

Naechon, 24.v.2002, C.W. Shin, J.S. Park, sifting (2♂♂, CNUIC); 24.v.2002, K.J. Ahn, near stream

(30♂♂41♀♀, CNUIC); Hongcheon-gun, Naechon, 24.v.2002, C.W. Shin, J.S. Park, sifting (2♂♂,

CNUIC); 24.v.2002, K.J. Ahn, J.S. Park, sifting (1♂, CNUIC); Gyeonggi Prov.: Euiwang-city, Cheong- gye-dong, Mt. Cheonggyesan, 20.ix.2000, U.S. Hwang, H.J. Kim, sifting (2♂♂3♀♀, CNUIC); Chungnam Prov.: Daejeon-city, Sutong-gol, 18.iv.1998, K.J. Ahn, H.J. Kim, H.J. Lim, K.L. Yu, ex near stream (34♂♂27♀♀, CNUIC); 19.iv.1998, K.J. Ahn, ex near stream (1♂, CNUIC); 9.v.1998,

K.L. You, H.J. Lim, ex under stone (1♂, CNUIC); 20.iv.2003, J.S. Park, ex near stream (12♂♂6♀♀,

CNUIC); 26.iv.2003, J.S. Park, S.M. Choi, ex near stream (1♀, CNUIC); Geumsubong, 23.ix.2001,

S.J. Park, ex near stream (1♂1♀, CNUIC); Geumsubong, 23.ix.2001, D.H. Lee, ex near stream (1♂, CNUIC); Gongju-city, Banpo-myeon, Sangsin-ri, Mt. Gyeryongsan, 21.v.2000, M.S. Kim, ex near stream (2♀♀, CNUIC); Keumsan-gun, Chubu-myeon, Seongdang-ri, 27.iv.2006, T.K. Kim, Y.H.

Kim, ex near stream (8♂♂25♀♀, CNUIC); 27.iv.2006, K.J. Ahn, ex near stream (1♀, CNUIC); Non- san-city, Beolgok-myeon, Mt. Daedunsan, Surak-valley, 2.v.2000, H.J. Kim, ex near stream (16♂♂

8♀♀, CNUIC); 2-10.v.2000, U.S. Hwang, S.J. Park, H.J. Kim, FIT (10♂♂9♀♀, CNUIC); Jeonbuk Prov.: Muju-gun, Anseong-myeon, Mt. Deokyusan, 27.v.2005, J.S. Park, S.I. Lee, T.K. Kim, ex under stone near stream (12♂♂11♀♀, CNUIC); Jeonnam Prov.: Kwangju-city, dong-gu, Seokgok-dong,

Mt. Mudeungsan, Poognam reservoir, 21.iv.2006, T.K. Kim, H.W. Kim, ex near stream (1♂, CNUIC). Gyeongbuk Prov.: Danyang-gun, Mt. Sobaeksan, Cheondong-ri, 8-9.v.1999, U.S. Hwang, H.J. Kim, sifting (1♂, CNUIC); Goisan-gun, Mundang-ri, Orimok, Mt. Chilbosan, 19.iv.2004, Y.J. Bae, ex near stream (1♂8♀♀, CNUIC).

Distribution: Korea (South), China, Japan, Russia (Far East). Coleoptera: Staphylinidae: Lesteva 17

Genus Lesteva Latreille, 1797

Lesteva Latreille, 1797: 75; Zanetti, 1987: 336; Downie and Arnett, 1996: 438; Newton et al., 2000: 340. Type species: Lesteva punctulata Latreille, 1804. 5 species recorded in Korea.

Diagnosis: Body broadly spindle-shaped, punctate and pubescent; head subquadrate, more or less depressed above; eye large and protruded, seta present among facets; ocelli distinct; antennae filiform; gular sutures divergent posteriorly; labrum transverse, anterior part membranous, anterior margin of sclerotized part emarginate broadly, long setae present on surface with pubescence; mandible subtriangular, slightly curved inwardly, molar area separated, left mandible with small tooth around middle, right mandible with tooth-like small projection around apical third; maxilla rather narrow, lacinia and galea slender; inner margin of lacinia with spines in apical half and with fine bristles in basal half; maxillary palpomere 3 wider than long; 4 more than 3.0 times as long as 3; ligula deeply bifid, labial palpomere 2 wider than long; mesoventrite with median carina; mesocoxal cavities contiguous; tergite IV with pair of patches of wing-folding spicules; tergite VII with apical palisade fringe.

Key to the species of the genus Lesteva

1. Body length more than 4.5 mm; antennomere 8 more than 2.5 times as long as wide ······· L. okiana - Body length less than 4.5 mm; antennomere 8 less than 2.5 times as long as wide ························· 2 2. ‌Pronotum slightly convex with fine punctures; prosternal process without carina; elytra covered with fine punctures with truncate posterior margin; apex of metaventral process rounded;

metatibia without long dark brownish setae (3-4 long golden setae present) ································· 3 - ‌Pronotum distinctly convex with coarse punctures; prosternal process with short, sinuous longitudinal carina; elytra covered with coarse punctures with rounded posterior margin; apex of metaventral process notched; metatibia with 10-14 long dark brownish setae ······························· 4 3. ‌Antennomere 4 about 2.1 times as long as wide, antennomere 8 about 1.8 times as long as wide; scutellar process broad; median lobe of aedeagus elongate, parallel-sided in basal three fourth, abruptly narrowed in apical fourth in dorsal view ···························································· L. cordicollis - ‌Antennomere 4 about 2.6 times as long as wide, antennomere 8 about 2.4 times as long as wide; scutellar process narrow; median lobe of aedeagus narrowed apically, lateral margin weakly arcuate in dorsal view ···················································································································· L. coreana 4. ‌Pronotum widest at anterior fourth; elytra bicolor with reddish patch around humeral region, moderately broad and long ····································································································· L. distincta - Pronotum widest at anterior third; elytra unicolor, broad and long ····································· L. miyabi

8. Lesteva cordicollis Motschulsky, 1860 (Pls. 1F, 5A-G)

Lesteva cordicollis Motschulsky, 1860: 549; Herman, 2001: 314; Sharvrin, 2001: 191; Smetana, 2004: 247; Kim and Ahn, 2011: 28.

Description: Body length 3.6-4.0 mm (head to abdominal end), covered with fine punctures and pubescence, brown to dark brown and glossy; head and pronotum black, mouthparts, anten- 18 Insect Fauna of Korea·Omaliinae nae and legs light brown. Head about 1.4 times as wide as long; eye about 3.3 times as long as temple; antenna pubescent, reaching middle of elytra, 4th antennomere 2.1 times as long as wide, 8th antennomere 1.8 times as long as wide. Pronotum slightly convex with fine punctures, widest near anterior fourth with ambiguous U-depression near middle, 1.3 times as wide as long, about 1.2 times as wide and 1.4 times as long as head; scutellum subtriangular, prescutoscutellar suture gently curved, scutellar process broad subtriangular; elytra bicolored, humeral region with large yellow patch and fine punctures, posterior margin truncate, 1.1 times as wide as long, 1.5 times as wide and 1.7 times as long as pronotum; apex of metaventral process rounded; external surface of metatibia with 3-4 long golden setae. Abdominal segments III-VIII with microsculpture. Aedea- gus: median lobe of aedeagus elongate, parallel-sided, apical process triangular, apical middle area elevated, internal sac backbone-shaped; paramere slender, slightly longer than median lobe, four setae present with two at apex.

Specimens examined: KOREA: Gangwon Prov.: Chuncheon-si, Nam-myeon, Mt. Bonghwasan

Chuncheon-si, Nam-myeon, Mt. Bonghwasan (N37°46′1.2″ E127°35′59.0″ 186 m), 17.ix.2008, T.K.

Kim, ex under stone near stream (1♂4♀♀, CNUIC); Inje-gun, Girin-myeon, Jogyeong-dong, Mt.

Bangtaesan (N37°56′3.3″ E128°25′43.6″ 843 m), 23.vi.2009, T.K. Kim, J.H. Song, ex moss near stream (1♂1♀, CNUIC); Chungnam Prov.: Daejeon, Yuseong-gu, Sutong-gol, 9.v.1998, K.R. You, H.J. Lim,

H.J. Kim, ex near stream (2♀♀, CNUIC); Jeonbuk Prov.: Muju-gun, Anseong-myeon, Mt. Deokyu- san, Chilyeon-fall, 27.v.2005, T.K. Kim, ex under stone near stream (8♂♂1♀, CNUIC); Jinan-gun,

Jeongcheon-myeon, Mt. Unjangsan, 19.v.1998, Y.B. Cho (2♀♀, CNUIC).

Distribution: Korea (South), Russia (East Siberia).

9. Lesteva coreana Kim and Ahn, 2011 (Pls. 1G, 6A-E)

Lesteva coreana Kim and Ahn, 2011: 29.

Description: Body length 3.1-3.5 mm (head to abdominal end), covered with fine punctures and pubescence, brown to dark brown and glossy; mouthparts, antennae and legs light brown. Head about 1.4 times as wide as long; eye about 3.1 times as long as temple; antenna pubescent, reaching middle of elytra, 4th antennomere 2.6 times as long as wide, 8th antennomere 2.4 times as long as wide. Pronotum slightly convex with fine punctures, widest near anterior fourth with obscure U-depression near middle, 1.3 times as wide as long, about 1.2 times as wide and 1.3 times as long as head; scutellum subtriangular, prescutoscutellar suture arcuate, scutellar process narrow triangular; elytra bicolored, humeral region with indistinct yellow patch and fine punctures, posterior margin truncate, 1.1 times as wide as long, 1.4 times as wide and 1.7 times as long as pronotum; apex of metaventral process rounded; external surface of metatibia with 3-4 long golden setae. Abdominal segments III-VIII with microsculpture. Aedeagus: median lobe of aedeagus narrowed apically, lateral margin weakly arcuate; basal region of paramere broad, narrowed apically, apical third constricted, slightly longer than median lobe, four setae present with two at apex.

Specimens examined: Type Series: Holotype, ♂: ‘KOREA: Jeonbuk Prov., Muju-gun, Anseong- myeon, Mt. Deokyusan, Chilyeon-fall, 27.v.2005, T.K. Kim, ex under stone near stream; Holotype, Lesteva coreana Kim and Ahn, Desig. T.-K. Kim and K.-J. Ahn 2010.’ Deposited in CNUIC, Daejeon; Coleoptera: Staphylinidae: Lesteva 19

Paratypes, same data as holotype (10♂♂1♀, CNUIC); Paratype, Lesteva coreana Kim and Ahn, Desig. T.-K. Kim and K.-J. Ahn 2010. Other materials: Mt. Deokyusan, Chilyeon-fall, 22-23.v.1998,

HJ Kim, ex near stream (1♀, CNUIC); same data as holotype (2♀♀, CNUIC); Chungnam Prov.:

Daejeon, Mt. Gyeryongsan, Keumsubong, 21.v.2000, S.J. Park, ex near stream (5♂♂5♀♀, CNUIC);

Yuseong-gu, Sutong-gol, 5.ix.1998, S.J. Baek (1♂, CNUIC); Sutong-gol, 9.v.1998, K.R. You, H.J. Lim,

H.J. Kim, ex near stream (1♀, CNUIC).

Distribution: Korea (South).

10. Lesteva distincta Watanabe, 1990 (Pls. 1H, 7A-F)

Lesteva distincta Watanabe, 1990: 178; Herman, 2001: 315; Smetana, 2004: 247; Kim and Ahn, 2011: 29.

Description: Body length 3.5-4.1 mm (head to abdominal end), covered with coarse punctures and pubescence, reddish brown to black and glossy; mouthparts, antennae and legs brown. Head about 1.2 times as wide as long; eye about 1.7 times as long as temple; antenna pubescent, reaching middle of elytra, 4th antennomere 2.1 times as long as wide, 8th antennomere 1.9 times as long as wide. Pronotum very convex with coarse punctures, about 1.2 times as wide as long, 1.2 times as wide and 1.3 times as wide as head, widest near anterior fourth with distinct U-depression near middle; scutellum subtriangular, prescutoscutellar suture arcuate, scutellar process broad pentagonal; elytra bicolored, humeral region with reddish brown patch and somewhat coarse punctures, posterior margin rounded, 1.1 times as long as wide, about 1.8 times as wide and 1.9 times as long as pronotum; apex of metaventral process notched; external surface of metatibia with 10-14 long dark brownish setae. Abdominal segments III and VIII with micro-sculpture. Aedeagus: median lobe of aedeagus broad, basal two third parallel-sided, apical third narrowed suddenly, apical process triangular, midline area elevated with longitudinal carina, lateral margin rolled dorsally; paramere robust, symmetrical, as long as median lobe, lateral margin rolled ventrally, apical region coiling ventrally and inwardly, four setae present.

Specimens examined: KOREA: Gangwon Prov.: Chuncheon-si, Sabuk-myeon, Jiam-ri, 15.iv.2001,

S.I. Lee (1♂, CNUIC); Chungbuk Prov.: Danyang-gun, Danyang-eup, Mt. Sobaeksan, Cheondong- area, 8-9.v.1999, U.S. Hwang, H.J. Kim, sifting (2♀♀, CNUIC); Yeongdong-gun, Sangchon-myeon,

Mulhan-ri, Mt. Minjujisan, Mulhan-stream (N36°3′15″ E127°52′31″), 16.vi.2006, T.K. Kim, ex under stone near stream (1♂, CNUIC); Mt. Manloi, 30.v.1998, H.J. Lim, sifting (1♀, CNUIC); Chungnam

Prov.: Daejeon-si, Yuseong-gu, Gung-dong, Chungnam National University (N36°22′38.7″ E127°20′

43.5″), 18.iv.2007, H.W. Kim, ex near pond (3♂♂2♀♀, CNUIC); Chungnam National University

(N36°22′38.7″ E127°20′43.5″), 7.v.2007, Y.H. Kim, ex near pond (7♂♂4♀♀, CNUIC); Chungnam

National University (N36°22′38.7″ E127°20′43.5″), 14.v.2007, H.W. Kim, ex near pond (12♂♂8♀♀, CNUIC); Yuseong-gu, Deokmyeong-dong, Sutonggol, 9.v.1998, K.R. You, H.J. Lim, H.J. Kim, ex near stream (1♂, CNUIC); Buyeo-gun, Naesan-myeon, Mt. Wolmyeongsan, Geumgisa, 3.v-1.vi.2000,

U.S. Hwang, H.J. Kim, FIT (1♀, CNUIC); Geumgisa, 1.vi.2000, U.S. Hwang, H.J. Kim, sifting (1♀, CNUIC); Jeonbuk Prov.: Buan-gun, Byeonsan-myeon, Mt. Naebyeonsan, Jikso-fall, 30.v.2001, Y.B.

Cho, sifting (1♂2♀♀, CNUIC); Jinan-gun, Jeongcheon-myeon, Mt. Unjangsan, 19.v.1998, Y.B. Cho (2♀♀, CNUIC); Jeonnam Prov.: Gurye-gun, Mt. Jirisan, Toji-myeon, Piagol, 24.v.2000, H.J. Kim, 20 Insect Fauna of Korea·Omaliinae

ex near stream (1♂1♀, CNUIC); Piagol, 24-27.v.2000, K.J. Ahn, S.J. Park, U.S. Hwang, FIT (1♀,

CNUIC); Jindo-gun, Uisin-myeon, Sacheon-ri, Mt. Cheomchilsan (N34°27′53.7″ E126°18′42.6″ 115 m), 23.ii.2007 T.K. Kim, sifting, leaf litter (1♀, CNUIC); Yeonggwang-gun, Hongnong-eup, Sangha- ri (N35°23′24.9″ E126°25′57.9″), 2.v.2007, K.J. Ahn, T.K. Kim, Y.H. Kim, ex near stream (2♀♀,

CNUIC); Hadong-gun, Hwagye-myeon, Ssanggyesa, 25.v.2000, H.J. Kim, ex near stream (1♂, CNUIC); Gyeongbuk Prov.: Cheongsong-gun, Budong-myeon, Mt. Juwangsan, 29.vi.1987, Y.B.

Cho, ex under moss (1♂, CNUIC); Gyeongnam Prov.: Geoje-si, Yeoncho-myeon, Mt. Aengsan (N34°

56′17.3″ E128°36′6.6″ 85 m), 21.i.2009, D.H. Lee, J.H. Song, ex under stone near mount stream (2♂♂ 1♀, CNUIC).

Distribution: Korea (South), Japan.

11. Lesteva miyabi Watanabe, 1990 (Pls. 1I, 8A-F)

Lesteva miyabi Watanabe, 1990: 175; Herman, 2001: 324; Smetana, 2004: 247; Kim and Ahn, 2011: 32.

Lesteva plagiata: Cho et al., 2002: 36 [Misidentification].

Description: Body length 3.8-4.5 mm (head to abdominal end), covered with coarse punctures and pubescence, dark brown to black and glossy; mouthparts, antennae and legs brown to reddish brown. Head about 1.3 times as wide as long; eye about 1.7 times as long as temple; antenna pubescent, reaching middle of elytra, 4th antennomere 1.9 times as long as wide, 8th antennomere 1.8 times as long as wide. Pronotum mostly convex with coarse punctures, widest near anterior third with distinct U-depression near middle, about 1.2 times as wide as long, about 1.1 times as wide and 1.2 times as long as head; scutellum subtriangular, prescutoscutellar suture rounded, scutellar process broadly pentagonal; elytra unicolored with coarse punctures, posterior margin rounded, 1.04 times as long as wide, 1.8 times as wide and 2.0 times as long as pronotum; apex of metaventral process notched; external surface of metatibia with 10-14 long dark brownish setae. Abdomi- nal segments III and VIII with microsculpture. Aedeagus: median lobe of aedeagus broad, narrow ed apically with longitudinal carina, lateral margin almost straight; paramere robust, symmetrical, as long as median lobe, lateral margin rolled ventrally, apical region coiled ventrally and inwardly, four setae present.

Specimens examined: KOREA: Jeju Prov.: Jeju-si, Arail-dong, Gwaneumsa, 26.v.2003, S.J. Park, ex near stream (10♂♂9♀♀, CNUIC); Jeju-si, Bonggae-dong, Muljang-oreum, 23.v.1998, Y.B. Cho

(3♂♂5♀♀, CNUIC); Jeju-si, Nohyeong-dong, Cheonwangsa (N33°24′25.4″ E126°29′42.7″ 395 m),

8.xi.2006, T.K. Kim, ex under stone near stream (1♂, CNUIC); Jeju-si, Orai-dong, Eorimok (N33°23′

26.0″ E126°29′41.1″ 1000 m), 31.v.2007, T.K. Kim, ex under stone near stream (2♀♀, CNUIC); Seo guipo-si, Hawon-dong, Seoguipo Natural Recreation Forest (N33°18′54.2″ E126°27′56.0″ 735 m),

30.v.2007, T.K. Kim, sifting, flood debris (1♀, CNUIC); Seoguipo Natural Recreation Forest (N33°18′

36″ E126°28′9.2″ 665 m), 31.v.2007, D.H. Lee, Y.H. Kim, sifting, leaf litter (1♀, CNUIC); Bukjeju-gun,

Aewol-eup, 1100-goji, 28.v.2003, C.W. Shin, ex near stream (2♂♂, CNUIC); 1100-goji (N33°21′ 40.6″

E126°27′44.6″ 1097 m), 12.x.2006, T.K. Kim, sifting, wet leaf litter (1♂2♀♀, CNUIC); 1100-goji (N33°

21′37.5″ E126°27′45.8″ 1110 m), 31.v.2007, T.K. Kim, sifting, leaf litter (9♂♂6♀♀, CNUIC); Bukjeju- gun, Jocheon-eup, Goepyeongi-oreum, 23.v.2006, S.J. Park, D.H. Lee, S.I. Lee, Y.H. Kim, leaf litter

(1♂, CNUIC); Goepyeongi-oreum (N33°25′2.7″ E126°38′32.6″ 530 m), 8.ix.2006, D.H. Lee, ex leaf lit- Coleoptera: Staphylinidae: Lesteva 21

ter (1♂5♀♀, CNUIC); Goepyeongi-oreum (N33°25′1.8″ E126°38′32.2″ 539 m), 8.ix.2006, T.K. Kim, ex wet grit near pond (1♂, CNUIC); Namjeju-gun, Namwon-eup, Dongsu-bridge (N33°22′8.4″

E126°37′30.7″ 640 m), 8.xi.2006, T.K. Kim, ex under stone near stream (3♂♂, CNUIC); Dongsu- bridge, 1.iii.2007, T.K. Kim, ex under stone near stream (2♂♂1♀, CNUIC); Dongsu-bridge (N33°

22′8.5″ E126°37′30.5″ 635 m), 29.v.2007, T.K. Kim, ex under stone near stream (18♂♂12♀♀, CNUIC);

Namjeju-gun, Namwon-eup, Goepyeongi-oreum, 28.v.2003, S.J. Park, C.W. Shin, M.J. Jeon, sifting

(16♂♂11♀♀, CNUIC); Geopyeongi-oreum, 28.v-27.vi.2003, Y.B. Cho, S.J. Park, C.W. Shin, FIT (1♂,

CNUIC); Mt. Hallasan, 900 m alt., Jejudo Is., 17.vii.1994, G.Sh. Lafer leg (1♂, CNUIC).

Distribution: Korea (South), Japan.

12. Lesteva okiana Watanabe, 2004

Lesteva okiana Watanabe, 2004: 74.

Description: Body length 4.6-4.8 mm (head to abdominal end), spindle-shaped and more or less depressed above, covered with fine punctures and pubescence, brown to dark brown and glossy; mouthparts, antennae and legs light brown. Head pentagonal, covered with punctures and pubescence, about 1.3 times as wide as long; eye with several setae present among facets, about 1.3 times as long as temple; ocelli distinct, distance between them 1.1 times as wide as distance between outside of ocellus and inner margin of eye; post ocular part arcuate; antenna threadlike and pubescent, reaching to near middle of elytra, basal two antennomeres glossy and remainder opaque; all antennomeres more than 2.0 times as long as wide; scape more or less robust, about 2.5 times as long as wide; pedicel to antennomere 11 almost same in width; 4 about 2.3 times as long as wide; 8 about 2.6 times as long as wide. Pronotum slightly convex with fine punctures, anterior and posterior mar- ginal areas slightly brighter than middle, widest near anterior fourth and more strongly narrowed posteriorly, small and circular bi-depressions present near middle, anterior angles rounded and posterior one rectangular, about 1.2 times as wide as long, about 1.2 times as wide as and 1.4 times as long as head; scutellum triangular with more or less rounded angles, sparsely punctate, prescutoscutellar suture arcuate; elytra flattened and dilated posteriorly, posterior margin truncate, yellowish markings present on anterior third, more or less triangular with rounded angles, posterior margin truncate, about 1.2 times as wide as long, 1.7 times as wide as and 1.6 times as long as pronotum; apex of metaventral process rounded; external surface of metatibia with 3-4 more or less long golden setae. Pair of ovate patches of wing-folding spicules present on medial part of tergites IV-V, patches of tergite IV bigger; tergite VII with apical palisade fringe. Male. Unknown. Female. Posterior margins of tergite VIII and sternite VIII more or less prolonged and pointed.

Specimens examined: KOREA: Jeonbuk Prov., Muju-gun, Seolcheon-myeon, Samgong-ri,

Baekyeonsa (N35°52.358′ E127°46.572′), 29.vi.2006, S.-I. Lee, T.-K. Kim, ex under stone near stream (2♀♀, CNUIC).

Distribution: Korea (South), Japan (Oki Islands). 22 Insect Fauna of Korea·Omaliinae

Genus Olophrum Erichson, 1839

Olophrum Erichson, 1839: 622; Scheerpeltz, 1929: 5; Hatch, 1957: 61; Steel, 1970: 18; Campbell, 1982: 579; Zanetti, 1987: 298; Watanabe, 1990: 126; Ryabukhin, 1991: 13; Downie and Arnett, 1996: 432; Newton et al., 2000: 340. Lathrium LeConte, 1850: 221; LeConte, 1861: 71; Campbell, 1982: 579. Type species: Omalium piceum Gyllenhal, 1810. 1 species recorded in Korea.

Diagnosis: Body spindle-shaped, more or less broad and convex, covered with punctures; antenna more or less elongate, slightly incrassate distally; labrum transverse, anterior part membranous with emarginate anterior margin; mandible subtriangular, molar area distinct, left mandible edentate and right mandible with small tooth near middle; maxillary palpomere 3 longer than wide; 4 almost as wide as and longer than 3 but less than 2.0 times; lacinia and galea slender, inner margin of lacinia with spines in apical half and with bristles in basal half; labial palpomere 2 wider than long; 3 more than 2.0 times as long as 2; gular sutures fused anteriorly and strongly divergent posteriorly; pronotum convex medially, lateral part with pit; elytra weakly convex; hind wing developed or reduced; abdomen impunctate but covered with microsculpture; tergite VII with apical palisade fringe.

13. Olophrum mutatum Scheerpeltz, 1929 (Pls. 1J, 9A-J)

Olophrum mutatum Scheerpeltz, 1929: 100; Watanabe, 1990: 129; 2013: 75.

Description: Body length 3.9-4.5 mm (head to abdominal end), body brown to dark brown, appendages yellowish brown. Head subpentagonal and depressed above, about 1.4 times as wide as long, eye protrude and ocular ridge surrounding eye, temple arcuate, eye about 2.0 times as long as temple; punctures getting coarser posteriorly and more or less densely; ocelli distinct, distance between them 1.2 times as long as distance from outside of ocellus to inner margin of eye; antenna more or less long, reaching to posterior margin of pronotum and slightly incrassate; scape to antennomere 3 glossy and remainder opaque; scape robust, about 1.8 times as long as wide; pedicel about 1.5 times as long as wide and about 0.4 times as long as scape; antennomere 3 more or less dilated apically, about 2.0 times as long as wide, about 1.5 times as long as pedicel; 4-6 almost same in length, about 1.5 times as long as wide; 7-9 almost same in length, 1.2 times as long as wide; 10 subquadrate, almost as wide as long, 1.1 times as long as 9; 11 about 1.6 times as long as wide. Pronotum subquadrate and transverse with arcuate lateral margins, more or less convex medially, covered with coarse punctures without microsculpture; widest around middle, about 1.4 times as wide as long; anterior margin slightly emarginate and posterior one weakly arcuate; anterior and posterior angles subrounded. Scutellum subtriangular, covered with more or less coarse punctures scatterdedly; elytra slightly convex and dilated posteriorly with straight lateral margins, covered with coarse punctures; almost as long as wide, about 1.3 times as wide as and about 2.0 times as long as pronotum. Abdomen broad and narrowed posteriorly, covered with coriaceous microsculpture but impunctate. Male. Inner surface of protibia excavated in apical third. Abdominal tergite VIII narrowed pos- Coleoptera: Staphylinidae: Trigonodemus 23 teriorly with emarginate posterior margin; sternite VIII narrowed posteriorly with arcuate posterior margin. Aedeagus trilobed; median lobe robust with more or less rounded apex, almost as long as basal bulb; each lateral part of basal bulb with vertical sclerites; paramere almost as long as median lobe and slightly curved inwardly, basal two fifth very slightly bended and apical region slightly expanded with two or three apical setae. Female. Abdominal tergite VIII narrowed posteriorly with truncate posterior margin; sternite VIII narrowed posteriorly with arcuate posterior margin.

Specimens examined: KOREA: Chungbuk Prov.: Cheontaesan, 21.x.1995, Y.B. Cho; Jincheon-gun, Jincheon-eup, Baekgok-reservoir, N36°51′54.6″ E127°24′29.6″ 110 m, 17.iv.2008, T.K. Kim, ex margin of reservoir (6♂♂3♀♀, CNUIC); Chungnam Prov.: Daejeon-city, Seo-gu, Wolpyeong-dong, N36°

20′24″ E127°21′13″, 2.xi.2008, Y.H. Kim, ex pond margin (2♀♀, CNUIC); Yuseong-gu, Bongmyeong- dong, N36°21′30.7″ E127°21′25.9″, 4.iv.2009, J.H. Song, ex near stream (9♂♂7♀♀, CNUIC); Yu- seong-gu, Chungnam Univ., 15.iv.2003, S.M. Choi, J.S. Park (1♂, CNUIC); Yuseong-gu, Oesam- dong, 20.iv.2008, D.H. Lee, ex under stone near stream (1♂1♀, CNUIC); TaeJon, Noeundong, 13. iv.1997, Y.B. Cho (1♂, CNUIC); Gongju-city, Banpo-myeon, Hakbong-ri, Mt. Gyerongsan, N36°21′

17.5″ E127°14′ 55.6″, 26.iv.2005, S.I. Lee, ex under garbage (1♂, CNUIC); Gyeryong-myeon, Yang- hwa-ri, Sinwonsa, 30.iii.2002, S.J. Park, C.W. Shin, J.S. Park, ex near stream (2♂♂5♀♀, CNUIC); Nonsan City, Beolgok-myeon, Mt. Daedunsan, Surak-valley, 2-10.v.2000, U.-S. Hwang, S.-J. Park,

H.-J. Kim, ex F.I.T (1♂, CNUIC); Jeonnam Prov.: Damyang-gun, Yong-myeon, Weolge-ri, Mt. Chu- welsan, 7.iv.2005, D.H. Lee, D.M. Lee, ex near stream (3♂♂, CNUIC); Muan-gun, Mongtan-myeon,

Mt. Seungdalsan, N34°54′52.4″ E126°27′25.4″ 130 m, 2.iv.2009, J.H. Song, ex near stream (4♂♂3♀♀,

CNUIC); Suncheon, 20.iv.1986, J.C. Pack (1♂5♀♀, CNUIC); Jeju Prov.: Jeju-city, Jocheon-eup,

Seonheul-ri, 2.iii.2007, Y.H. Kim, ex margin of pond (1♂1♀, CNUIC).

Distribution: Korea (South), Japan.

Genus Trigonodemus LeConte, 1863

Trigonodemus LeConte, 1863: 56; Hatch, 1957: 68; Downie and Arnett, 1996: 434; Newton et al., 2000: 340; Kim and Ahn, 2008: 175. Type species: Trigonodemus striatus LeConte, 1863. 1 species recorded in Korea.

Diagnosis: Body spindle-shaped, convex, glossy; head depressed, longer than wide, pair of oblique furrows present from ocellus to antenna; eye prominent, ocelli distinct; antenna reaching to the posterior margin of the pronotum; pronotum trapezoidal, widest at base; longitudinal carina present on posterior half of mesoventrite; elytra convex, covering almost whole abdomen excluding apical one or two segments, covered with coarsely striated punctures; large defensive gland present on basal margin of sternite VIII, abdominal tergites and sternites VIII sexually dimorphic (Watanabe, 1990; Kim and Ahn, 2008).

14. Trigonodemus koreanus Kim and Ahn, 2008 (Pls. 1K, 10A-H)

Trigonodemus koreanus Kim and Ahn, 2008: 176. 24 Insect Fauna of Korea·Omaliinae

Description: Body length 3.6-4.2 mm (head to abdominal end). Body reddish yellow to yellowish brown; head reddish brown; pronotum, elytra, abdomen and legs yellowish brown; pronotum and elytra bicolored, pronotum with butterfly-shaped blackish marking near central area; elytra with blackish marking in middle and latero-posterior areas. Head oblong and depressed, slightly longer than wide; oblique furrow with series of punctures, transverse furrow present behind clypeus; eye about 2.6 times as long as temple, postocular region rounded; ratio of distance between ocelli to distance between outside of ocellus and inner margin of eye 2.1; antenna elongate, widened apically; all antennomeres longer than wide, antennomeres 1-4 glossy and 5-11 opaque; scape robust, about 2.5 times as long as wide; pedicel 2.3 times as long as wide, 0.66 times as long as and 0.71 times as wide as scape; pedicel and antennomeres 3-4 almost equal in width; antennomere 3 slender, slightly dilated apically, 3.2 times as long as wide, 4 shortest, 1.82 times as long as wide, 5 about 1.65 times as long as wide, 6-9 subequal in length and width, 10 subequal in width and similar to 6-9, but slightly decreasing in length, 11 longest and widest, 1.84 times as long as wide. Pronotum covered with punctures, much larger and coarser than those on head; lateral margin narrow anteriorly from middle, anterior half arcuate and posterior half almost straight, 1.2 times as wide as long, 1.6 times as wide as and 1.3 times as long as head; anterior angle rounded, posterior one rectangular; anterior margin broadly emarginate, posterior one almost straight. El- ytra 1.4 times as long as wide, 1.7 times as wide as and 3.0 times as long as pronotum, 10 rows of punctured striae present. Leg long and slender. Male. Protibia slightly excavated in apical half of medial surface. Abdominal tergite VIII with emarginate posterior margin; posterior margin of sternite VIII broadly rounded. Aedeagus: median lobe narrowed apically, apical region of apical process with tubercles; constricted apically in lateral aspect; paramere thick and long, almost parallel-sided, longer than median lobe; medial margin almost straight, lateral margin slightly rolled, apical margin excavated, apical fifth of lateral margin curved inward, apex with four setae. Female. Abdominal tergite VIII with truncate posterior margin; posterior margin of sternite VIII sinuate with prolonged apex.

Specimens examined: Holotype, ♂: ‘KOREA: Gangwon Prov., Pyeongchang-gun, Jinbu-myeon, Dongsan-ri, Mt. Odaesan, Sangwonsa, 22.vi-16.viii.2001, S.-J. Park, C.-W. Shin, FIT; Holotype, Trigonodemus koreanus Kim and Ahn, Desig. T.-K. Kim and K.-J. Ahn 2006.’ Deposited in CNUIC,

Daejeon. Paratype, 15 (total); 3♂♂: same data as holotype except ‘Jeokmyeolbogung, 7-9.x.1999, U.-S. Hwang, M.-S. Kim, FIT’; 1♀: same data as holotype except ‘22.viii-20.x.2000, K.-J. Ahn, FIT’;

1♂, 3♀♀ (1♂, 1♀ on slide): same data as holotype except ‘4-22.vi.2001, K.-J. Ahn, S.-J. Park, M.-S. Kim, M.-J. Jeon, FIT’; 1♂, 2♀♀: same data as holotype; 1♂: same data as holotype except ‘16.viii- 15.ix.2001’; 1♂: same data as holotype except ‘15.ix-14.xi.2001, K.-J. Ahn, C.-W. Shin, FIT’; 1♀: same data as holotype except ‘15.ix.2001, S.-J. Park’; 1♀ (in EtOH): same data as holotype except ‘21. ix.2006, S.-J. Park, ex mushroom.’ Deposited in CNUIC, Daejeon.

Distribution: Korea (South). Coleoptera: Staphylinidae: Uenohadesina 25

Genus Uenohadesina Smetana, 2000

Uenohadesina Smetana, 2000: 285. Type species: Uenohadesina styx Smetana, 2000. 1 species recorded in Korea.

Diagnosis: Body spindle-shaped, convex, elytra covering almost whole abdomen, covered with scattered micro setae; head subrounded, nuchal area constricted indistinctly, eye small; ocelli absent, dorsal tentorial pits present on vertex; temple more or less flat, distinctly longer than eye; antennae subfiliform, slightly incrassate distally, reaching to posterior margin of pronotum; antennomeres 1-4 glossy; maxilla with more or less robust palpus, palpomere 4 gradually narrowed apically, almost as wide as and about 2.0 times as long as 3; labium with palpomere 3 slightly wider and longer than 2; gular sutures divergent posteriorly; pronotum trapezoidal, widest at posterior margin, slightly wider than long; prosternum short and transverse with short and acute prosternal process; elytra oval and convex, covered with scattered fine punctures; mesoventrite with median carina, mesoventral process with truncate apex, mesocoxal cavities separated.

15. Uenohadesina styx Smetana, 2000

Uenohadesina styx Smetana, 2000: 291; Herman, 2001: 376; Smetana, 2004: 252.

Description: Body length 3.0-3.3 mm (head to abdominal end). Body suboval and convex, head and pronotum more or less deflected, covered with scattered fine setae. Head subtrapezoidal, covered with more or less minute and sparse punctures, becoming coarser posteriorly, almost as wide as long; eye small and convex slightly; temple almost straight, narrowed posteriorly and angular, about 2.8 times as long as eye; ocelli absent, rounded impressions present near each dorsal tentorial pit; nuchal constriction more or less indistinct; nuchal area covered with microsculpture; gular sutures divergent posteriorly. Antenna subfiliform, reaching to posteri- or margin of pronotum, incrassate distally; scape to antennomere 5 and 11 distinctly longer than wide, 6-8 almost as wide as long, 9-10 wider than long; basal four antennomeres lustrous and remainder more or less lusterless; scape robust, about 1.6 times as long as wide; scape to antennomere 3 almost same width; pedicel slightly dilated apically, about 1.9 times as long as wide, slightly narrower than scape; antennomere 3 dilated apically, about 2.2 times as long as wide; 4-10 getting wider and shorter distally, 4-8 subhexagonal and 9-10 subtetragonal; 4 about 1.4 times as long as wide; 10 about 1.5 times as wide as long; 11 about 1.5 times as long as wide, almost as wide as and about 2.4 times as long as 10. Pronotum subtrapezoidal, anterior part more or less convex laterally and flattened posteriorly, covered with scattered minute punctures; lateral margin arcuate, widest at posterior margin and narrowed anteriorly, about 1.2 times as wide as long, about 1.4 times as wide as and 1.25 times as long as head; prosternum short and transverse, prosternal process very short with acute apex, furcasternum broad and trapezoidal, protrochantin almost concealed, postcoxal process subtetragonal; scutellum triangular more or less transversely; elytra oval and convex, covering almost whole abdomen, with rounded apex, lateral margin arcuate, widest at anterior third, almost as wide as long, about 1.7 times as wide as and 2.0 times as long as pronotum; mesoventrite covered with microsculpture, medial carina present 26 Insect Fauna of Korea·Omaliinae longitudinally and elevated from anterior third to posterior fourth; mesocoxal process and intercoxal process of metaventrite broad with truncate apex; mesocoxal cavities separated distinctly; metaventrite broad, covered with scattered minute punctures, metendosternite transverse strongly, about 0.7 times as wide as metaventrite. Abdomen broad and slightly convex ventrally, segments III-V parallel-sided and remainder gently narrowed posteriorly; tergites III-IV more or less unscle- rotized and covered with transverse sculpture; tergite IV bearing two transverse triangular markings on medial area just before posterior margin; tergite VII without apical palisade fringe; sternite III with intercoxal process, carina-delimited impressions present and carina continuing laterally; lateral part of sternal sutures on sternites III-VI strongly curved posteriorly. Legs moderately long, metatarsus about 0.7 times as long as metatibia; metatarsomere 5 about 0.3 times as long as basal four combined. Male. Posterior margin of tergite VIII slightly emarginate; posterior margin of sternite VIII more or less emarginate broadly. Aedeagus: median lobe elongate with small rounded basal bulb, basal half slightly narrowed apically and apical half almost parallel-sided with rounded apex; paramere elongate, almost as long as median lobe, basal part more or less expanded, gently narrowed apically, medial margin emarginate broadly, medial part of apex more or less emarginate with two or three minute setae. Female. Posterior margin of tergite VIII subtruncate; posterior margin of sternite VIII extended slightly.

Specimens examined: KOREA: Gyeongbuk Prov., Bongwha-gun, Jaesan-myeon, Dongmyeon-ri,

Hwaetgol-cave, 2.x.2000 (1♂, HUNHM); Gangwon Prov., Yeongwol-gun, Hadong-myeon, Jin- byeol-ri, Gossi-cave, 4.xi.2000 (3♂♂, HUNHM); Hadong-myeon, Gossi-cave, 16.xi.2005, B.W. Kim (2♂♂1♀, CNUIC).

Distribution: Korea (South). Remarks: Habitus is non-staphylinid in appearance, but classified in the subfamily Omaliinae with the following characters: anterior projection of abdominal sternite VIII, vertex with paired pigmented spots, and intersegmental membranes with brickwall-like patterning. Possible close relationships with the genera Trigonodemus LeConte and Tanyrhinus Mannerheim were discussed by

Smetana (2000).

Tribe Coryphiini Jakobson, 1908

Coryphiina Jakobson, 1908: 452. Coryphiini: Portevin, 1929: 430; Hatch, 1957: 70; Newton et al., 2000: 341. Type genus: Coryphium Stephens, 1834. 7 species in 3 genera recorded in Korea.

Key to the subtribes of the tribe Coryphiini

1. Gular sutures almost parallel ······························································································ Boreaphilina - Gular sutures divergent posteriorly ······················································································ Coryphiina Coleoptera: Staphylinidae: Archaeoboreaphilus 27

Subtribe Boreaphilina Zerche, 1990

Boreaphilina Zerche, 1990: 158; Newton et al., 2000: 341. Type genus: Boreaphilus Sahlberg, 1832. 5 species in 2 genera recorded in Korea.

Key to the genus of the subtribe Boreaphilina (modified from Zerche, 1990)

1. Pronotum wider than long longer than widestreckt breit oder gestreckt ··········· Archaeoboreaphilus - Pronotum longer than wide ···································································································· Boreaphilus

Genus Archaeoboreaphilus Zerche, 1990

Archaeoboreaphilus Zerche, 1990: 158; Kim and Ahn, 2012: 2509. Type species: Boreaphilus nikkoensis Sawada, 1964. 2 species recorded in Korea.

Diagnosis: Body spindle-shaped and more or less flattened dorsally; head subrounded, frontal area more or less depressed, vertex rather convex; eye protrude, seta present among facets, ocelli present; labrum with hair-like sensilla on anterior margin; gena convex; gular sutures almost parallel; pronotum more or less broad, lateral margin crenulate and widest in anterior third or near middle; elytra dilated posteriorly and flattened dorsally with truncate posterior margin; male protarsus more or less broad.

Key to the species of Archaeoboreaphilus

1. Elytra unicolor ····················································································································· A. macrothorax - Elytra bicolor with red oval marking ········································································· A. rubromaculatus

16. Archaeoboreaphilus macrothorax Kim and Ahn, 2012 (Pls. 1L, 11A-I)

Archaeoboreaphilus macrothorax Kim and Ahn, 2012: 2514.

Description: Body length 3.7-3.8 mm (head to abdominal end), parallel-sided, depressed above, covered with coarse punctures and golden pubescence, brownish black to black and glossy. Head subglobular, slightly broad, about 1.05 times as wide as long; eye protruding, as long as temple; antenna threadlike, pubescent, reaching anterior third of elytra; scape oval and robust, about 2.0 times as long as wide; pedicel to antennomere 10 subtrapezoidal, width of antennomeres 2-6 almost same, antennomeres 6-10 getting slightly wider; pedicel about 2.44 times as long as wide, antennomere 3 about 2.78 times as long as wide; antennomere 7 about 2.32 times as long as wide; antennomere 8 about 2.1 times as long as wide; antennomere 9 about 2.0 times as long as wide; antennomere 11 longest, 3.81 times as long as wide; gular sutures parallel, gular plate narrow, 0.1 times as wide as head; postgena convex. Pronotum subhexagonal and convex, covered with coarse punctures, widest at anterior third, anterior third of midline depressed, middle area longitudinally 28 Insect Fauna of Korea·Omaliinae elevated, U-shaped depression present behind medial elevation, lateral margins weakly crenulate, post-lateral margin clearly emarginate, 1.11 times as wide as long, almost as wide as and 0.94 times as long as head. Elytra unicolored, dilated posteriorly, coarsely punctate, 1.03 times as long as wide, 1.5 times as wide and 1.71 times as long as pronotum. A pair of wing-folding patches present on tergites IV and V; tergite VII with apical palisade fringe. Male. Protarsus broad. Medial posterior area of sternite VII depressed with numerous obtuse macrosetae, posterior margin shallowly emarginate; anterior margin of tergite VIII deeply sinuate, posterior margin slightly emarginate; anterior projection of sternite VIII wider than half of sternite, posterior margin emarginate; sternite IX narrow, posterior third of lateral margin almost parallel, basal part of dorsal surface with short longitudinal carina, apical area pubescent with two long setae. Aedeagus: median lobe of aedeagus slender and weakly sinuate, narrowed apically, apex of median lobe strongly upturned; paramere parallel, almost as long as median lobe, a little longer than basal bulb, posterior quarter somewhat constricted.

Specimens examined: Holotype, ♂: ‘KOREA: Gangwon Prov., Pyeongchang-gun, Jinbu-myeon, Mt. Odaesan, Sangwonsa, N37°47′8.6″ E128°33′56.2″ 880 m, 16.iv.2008, Y.H. Kim, sifting flood debris. Holotype, Archaeoboreaphilus macrothorax Kim and Ahn, Desig. T.-K. Kim and K.-J. Ahn 2011. Paratypes, KOREA: Gangwon Prov., Pyeongchanggun, Jinbu-myeon, Mt. Odaesan, Sangwonsa,

22.viii-20.x.2000, K.J. Ahn, FIT (1♀). Paratype, Archaeoboreaphilus macrothorax Kim and Ahn, Desig.

T.-K. Kim and K.-J. Ahn 2011; Sangwonsa, 22.vi-16.viii.2001, S.-J. Park, C.-W. Shin, FIT (1♀), Para- type, Archaeoboreaphilus macrothorax Kim and Ahn, Desig. T.-K. Kim and K.-J. Ahn 2011; Sangwonsa,

N37°47.074′ E128°33.735′ 15.v.2006, T.-K. Kim, H.-W. Kim, sifting leaf litter (1♀), Paratype, Archaeo- boreaphilus macrothorax Kim and Ahn, Desig. T.-K. Kim and K.-J. Ahn 2011.

Distribution: Korea (South).

17. ‌Archaeoboreaphilus rubromaculatus Kim and Ahn, 2012 (Pls. 2A, 12A-H)

Archaeoboreaphilus rubromaculatus Kim and Ahn, 2012: 2511.

Description: Body length 3.4-3.6 mm (head to abdominal end), parallel-sided, slightly depressed above, covered with fine punctures and golden pubescence, brown to dark brown and glossy. Head subglobular, slightly transverse, about 1.09 times as wide as long (include eye); frons depressed; vertex convex; eye protruding, as long as temple; antenna thread-like, pubescent, reaching just behind pronotal posterior margin; scape oval and robust, about 2.0 times as long as wide; pedicel to antennomere 10 subtrapezoidal, width of antennomeres 2-4 almost same, antennomeres 4-10 getting slightly wider; pedicel about 2.53 times as long as wide, antennomere 3 about 2.8 times as long as wide, 7 about 1.94 times as long as wide, 8 about 1.68 times as long as wide, 9 about 1.7 times as long as wide, 11 longest, 3.2 times as long as wide; gular sutures parallel, gular plate a little broad, 0.13 times as wide as head; postgena a little convex. Pronotum subhexagonal, convex, covered with fine punctures, 1.08 times as wide as long, 0.91 times as wide and 0.92 times as long as head, widest at anterior third, weak depression present on anterior third of midline, posterior third with weak and longitudinal elevation, shallow U-shaped depression present near pos- Coleoptera: Staphylinidae: Boreaphilus 29 terior quarter, lateral margins weakly crenulate, post-lateral margin almost straight. Elytra slightly dilated posteriorly with truncate posterior margin, reddish oval marking present on middle, 1.05 times as long as wide, 1.59 times as wide and 1.82 times as long as pronotum. Abdomen broad, a pair of wing folding patches present on tergites IV and V; tergite VII with apical palisade fringe. Male. Protarsus more or less broad. Sternite VII pubescent, posterior margin straight; anterior margin of tergite VIII sinuate weakly, posterior margin slightly emarginate; width of anterior projection of sternite VIII almost equal to half of sternite width, posterior margin sinuate; sternite IX broad, lateral margin constricted on posterior third, basal part of dorsal surface with short longitudinal carina, apical area pubescent with two long setae. Aedeagus: median lobe of aedeagus broad and narrowed apically, lateral margin straight, apical part curved dorsally; paramere almost as long as basal bulb, slightly curved inwardly, lateral margin of paramere bent in basal fifth.

Specimens examined: Holotype, ♂: ‘KOREA: Gangwon Prov., Hongcheon-gun, Nae-myeon, Mt Gyebangsan, N37°42′49.9″ E128°26′40.5″, 1100 m, 11.v.2007, T.K. Kim, Y.H. Kim, wet leaves near mountain bog. Holotype, Archaeoboreaphilus rubromaculatus Kim and Ahn, Desig. T.-K. Kim and K.-J. Ahn 2011. Paratype, KOREA: Gangwon Prov. Pyeongchang-gun, Jinbu-myeon, Mt Odaesan, Sang- wonsa, 19.iv-10.v.2007, T.K. Kim, Y.H. Kim, FIT (1♀), Paratype, Archaeoboreaphilus rubromaculatus Kim and Ahn, Desig. T.-K. Kim and K.-J. Ahn 2011.

Distribution: Korea (South).

Genus Boreaphilus Sahlberg, 1832

Boreaphilus Sahlberg, 1832: 433; Zanetti, 1987: 434; Zerche, 1990: 169; 1993: 344; Watanabe, 1990: 370; Downie and Arnett, 1996: 436; Newton et al., 2000: 341. Type species: Boreaphilus henningianus Sahlberg, 1832. 3 species recorded in Korea.

Diagnosis: Body almost parallel-sided and more or less flattened dorsally; head broadly oval, frons more or less depressed and vertex rather convex; temple arcuate and as long as or longer than eye; frons area depressed; ocelli present; antennae more or less short; labrum transverse, mandible narrow and curved inwardly with conspicuous acute tooth around middle; gular sutures almost parallel; mentum subtrapezoidal, anterior half of lateral margin almost straight and narrowed anteriorly, posterior half arcuate; pronotum narrower than head; legs more or less long; abdomen more or less broad and nearly parallel-sided.

Key to the Korean species of the genus Boreaphilus

1. Head rounded, oblique ridges closed; elytra almost as long as wide ···························· B. temporalis - Head less rounded, oblique ridges widely separated; elytra longer than wide ······························· 2 2. Body dark brown to black; antennomeres 7 and 10 as long as wide; lateral margin of pronotum narrowed anteriorly and posteriorly; pronotal anterior margin narrower than posterior margin; median lobe of aedeagus slender and slightly longer than paramere ························ B. graciliformis - Body yellowish brown to brown; antennomeres 7 and 10 longer than wide; lateral margin of pronotum almost parallel; pronotal anterior margin almost as wide as posterior margin; median lobe of aedeagus robust with subrounded apex and as long as paramere ····················· B. japonicus 30 Insect Fauna of Korea·Omaliinae

18. Boreaphilus graciliformis Zerche, 1990 (Pls. 2B, 13A-D)

Boreaphilus graciliformis Zerche, 1990: 183; Herman, 2001: 384; Shin and Ahn, 2003: 350; Smetana, 2004: 252; Watanabe, 2013: 77.

Boreaphilus liwisianus: Watanabe, 1990: 375 [cited as lewisianus but misspelling and misidentification according to Zerche, 1993: 352].

Description: Body length 3.0-3.5 mm (head to abdominal end). Body elongate, parallel-sided and more or less flattened dorsally; covered with more or less coarse punctures and golden setae; brownish black to black and lustrous, mouthparts and appendages reddish brown. Head broadly oval, covered with coarse punctures more or less densely but frontal area almost impunctate; about 1.3 times as wide as long; eye more or less large and protruded; temple arcuate and about 1.3 times as long as eye; ocelli distinct, distance between them about 1.5 times as long as from outside of ocellus to inner margin of eye; antenna more or less short reaching to posterior fourth of pronotum, weakly incrassate apically; scape robust and suboval, about 1.5 times as long as wide; pedicel rounded quadrate, about 1.4 times as long as wide, antennomere 3 elongate and slightly dilated apically, about 1.3 times as long as wide, 4-10 subtrapezoidal, almost as wide as long; 11 about 1.5 times as long as wide, slightly wider and 1.7 times as long as 10. Pronotum subcylindrical, lateral margin with crenulate projection around middle, narrowed anteriorly and posteriorly; more or less densely covered with coarse punctures, U-shaped depression present on posterior fourth; widest around middle, about 1.1 times as long as wide, about 0.8 times as wide as head. Elytra slightly dilated posteriorly with truncate posterior margin, covered with more or less coarse punctures; about 1.4 times as long as wide, about 1.4 times as wide as and 1.8 times as long as pronotum. Abdomen parallel-sided, almost as wide as elytra; tergite VII with apical palisade fringe. Male. Abdominal tergite VIII narrowed posteriorly with truncate posterior margin; sternite VIII narrowed posteriorly with slightly emarginate posterior margin. Aedeagus: median lobe narrowed apically with more or less acute apex; paramere slightly shorter than median lobe, apical third slightly curved inwardly. Female. Abdominal tergite VIII narrowed posteriorly with truncate posterior margin; sternite VIII narrowed posteriorly with narrowly truncate posterior margin.

Specimens examined: KOREA: Chungnam Prov.: Daejeon-city, Yuseong-gu, Sutonggol, 18.iv.1998,

H.J. Kim, K.R. Yu, ex near stream (1♀, CNUIC); Nonsan-city, Beolgok-myeon, Mt. Daedun, Surak- valley, 2.v.2000, H.J. Kim, ex near stream (1♀, CNUIC); ex sifting (1♂, CNUIC); Gongju-city, Mt.

Gyeoryong, Woosambong, 3.v.2000, U.S. Hwang, S.J. Park, ex sifting (1♂, CNUIC); Gyeongbuk

Prov.: Mungyeong-city, Mungyeongsaejae, 8.v.1999, Y.B. Cho (1♂1♀, CNUIC). Distribution: Korea, Japan.

19. Boreaphilus japonicus Sharp, 1874 (Pls. 2C, 13E-H)

Boreaphilus japonicus Sharp, 1874: 96; Watanabe, 1990: 373; 2013: 77; Zerche, 1990: 185; 1993: 353; Herman, 2001: 386; Shin and Ahn, 2003: 351; Smetana, 2004: 253. Coleoptera: Staphylinidae: Boreaphilus 31

Description: Body length 2.7-3.1 mm (head to abdominal end). Body elongate, parallel- sided and more or less flattened dorsally; covered with coarse punctures; yellowish brown to brown and lustrous. Head broadly oval, covered with coarse punctures more or less densely but frontal area almost impunctate; about 1.2 times as wide as long; eye more or less large and protruded; temple arcuate and about 1.6 times as long as eye; ocelli distinct, distance between them about 1.3 times as long as from outside of ocellus to inner margin of eye; antenna more or less short reaching to posterior fourth of pronotum, weakly incrassate apically; scape robust and suboval, about 1.4 times as long as wide; pedicel rounded quadrate, about 1.3 times as long as wide, antennomere 3 elongate and slightly dilated apically, about 1.6 times as long as wide, 4-10 subtrapezoidal, slightly longer than wide; 11 about 1.7 times as long as wide, slightly wider and 1.5 times as long as 10. Pronotum subcylindrical, lateral margin almost straight with crenulate projection around middle, covered with coarse punctures, shallow U-shaped depression present around posterior third; widest around middle, about 1.3 times as long as wide, about 0.8 times as wide as head. Elytra slightly dilated posteriorly with truncate posterior margin, covered with coarse punctures; about 1.3 times as long as wide, about 1.4 times as wide as and 1.8 times as long as pronotum. Abdomen parallel-sided, slightly broader than elytra; tergite VII with apical palisade fringe. Male. Abdominal tergite VIII narrowed posteriorly with truncate posterior margin; sternite VIII narrowed posteriorly with slightly emarginate posterior margin; aedeagus: median lobe robust and narrowed apically with rounded apex; paramere almost as long as median lobe, apical half slightly curved inwardly. Female. Abdominal tergite VIII narrowed posteriorly with truncate posterior margin; sternite VIII narrowed posteriorly with narrowly truncate posterior margin.

Specimens examined: KOREA: Chungnam Prov.: Cheongyang-gun, Mt. Chilgap, Janggoksa,

14.v.1996, Y.B. Cho (1♂, CNUIC); Daejeon-city, Yuseong-gu, Sutonggol, 18.iv.1998, H.J. Kim, K.R.

Yu, ex near stream (1♀, CNUIC); Nonsan-city, Beolgok-myeon, Mt. Daedun, Surak-valley, 2.v.2000,

H.J. Kim, ex near stream (1♀, CNUIC); Gyeongbuk Prov.: Danyang-gun, Mt. Sobaek, Cheongdong

Area, 8-9.v.1999, U.S. Hwang, H.J. Kim, ex sifting (1♂1♀, CNUIC).

Distribution: Korea, Japan, China, Russia (Far East).

20. Boreaphilus temporalis Zerche, 1990 (Pls. 2D, 13I-L)

Boreaphilus temporalis Zerche, 1990: 189; Herman, 2001: 387; Smetana, 2004: 253; Watanabe, 2013: 77.

Description: Body length 2.6-3.0 mm (head to abdominal end). Body elongate, parallel-sided and more or less flattened dorsally; covered with more or less coarse punctures and golden setae; yellowish brown to brown and lustrous. Head rounded, covered with coarse punctures more or less densely but frontal area almost impunctate; about 1.3 times as wide as long; eye more or less small but protruded; temple arcuate and about 2.0 times as long as eye; ocelli distinct, distance between them about 1.7 times as long as from outside of ocellus to inner margin of eye; antenna more or less short, reaching to posterior fourth of pronotum, more or less incrassate apically; scape robust and suboval, about 1.4 times as long as wide; pedicel suboval, about 1.4 times as long as wide, antennomere 3 more or less elongate and slightly dilated apically, about 1.6 times as long as wide, 4-6 subrounded, slightly longer than wide; 7-10 subquadrate, almost as wide as long; 11 about 32 Insect Fauna of Korea·Omaliinae

1.5 times as long as wide, as wide as and 1.4 times as long as 10. Pronotum subcylindrical, lateral margin almost straight with crenulate projection around middle, covered with more or less coarse punctures, U-shaped depression present distinctly posterior fifth; widest around middle, slightly longer than wide, about 0.8 times as wide as head. Elytra slightly dilated posteriorly with truncate posterior margin, covered with more or less coarse punctures; almost as wide as long, about 1.6 times as wide as and 1.7 times as long as pronotum. Abdomen parallel-sided, almost as wide as elytra; tergite VII with apical palisade fringe. Male. Unknown. Female. Abdominal tergite VIII narrowed posteriorly with truncate posterior margin; sternite VIII narrowed posteriorly with narrowly truncate posterior margin.

Specimens examined: KOREA: Gyeongbuk Prov.: Tangyang-gun, Sobaeksan, Chŏndong Area,

8-9.v.1999, U.-S. Hwang and H.-J. Kim, ex sifting (1♀, CNUIC).

Distribution: Korea (South), Japan.

Subtribe Coryphiina Jakobson, 1908

Coryphiina Jakobson, 1908: 452; Zerche, 1990: 26; Newton et al., 2000: 341. Type genus: Coryphium Stephens, 1834. 2 species in 1 genus recorded in Korea.

Genus Eudectus Redtenbacher, 1857

Eudectus Redtenbacher, 1857: 245; Zanetti, 1987: 424; Watanabe, 1990: 351; Zerche, 1990: 142; New- ton et al., 2000: 342; Kim and Ahn, 2014a: 172. Eudectoides Campbell, 1978: 11; Zerche, 1990: 144. Type species: Eudectus giraudi Redtenbacher.

Diagnosis: Body parallel-sided, gently convex, covered with coarse punctures and fine pubescence; eye large and protruding, ocelli distinct; pair of deep dorsal tentorial pits present; gular sutures divergent posteriorly; labrum transverse; mandible elongate and curved inwardly with large internal tooth; maxillary palpomere 3 oval and expanded, palpomere 4 glabrous, much smaller and slender than 3; pronotum hexagonal, more or less convex and transverse, broader than head, lateral margin crenulate and angular around middle; postcoxal process tetragonal, protrochantin almost concealed; abdomen more or less broad and flat; tergite III covered with spicules almost all over; anterior three fourths of paratergite III covered with distinctly coriaceous sculpture; pair of oval patches of wing-folding spicules present on medial part of tergite IV; tergite VII with apical palisade fringe; front tarsus broad in male; lateral part of sternite III with oblique carina.

Key to the Korean species of the genus Eudectus

1. Head, thorax and elytra brown to reddish brown, abdomen dark brown; antennomere 3 more or less gradually dilated apically and longer than wide, 4-8 less transverse; postero-lateral margin Coleoptera: Staphylinidae: Eudectus 33

of pronotum clearly emarginate; metaventrite without marking; median lobe of aedeagus longer than paramere ·························································································································· E. japonicus - Head, thorax and elytra yellowish brown, abdomen brown but basal and apical segments darker; antennomere 3 more or less abruptly dilated apically and slightly longer than wide, 4-8 strongly transverse; postero-lateral margin of pronotum almost straight or obscurely emarginate; metaventrite with dark tri-markings; median lobe of aedeagus slightly shorter than paramere ···· ························································································································································ E. rufulus

21. Eudectus japonicus Zerche, 1990 (Pls. 2E, 14A-M)

Eudectus japonicus Zerche, 1990: 157; Herman, 2001: 402; Smetana, 2004: 254; Watanabe, 2013: 77; Kim and Ahn, 2014a: 172.

Description: Body length 2.5-2.7 mm (head to abdominal end). Body more or less convex and parallel-sided, covered with coarse punctures and pubescence; reddish brown to dark brown, more or less glossy. Head transversely pentagonal, coarsely and sparsely punctate, about 1.4 times as wide as long; eye about 2.0 times as long as temple; distance between ocelli about 1.4 times as long as distance between outside of ocellus and inner margin of eye; antenna relatively short and stout, gradually incrassate distally, reaching to just below pronotum, antennomeres 1-5 more or less glossy; scape robust, about 1.3 times as long as wide; pedicel suboval, about 1.2 times as long as wide, slightly narrower and shorter than scape; antennomere 3 about 1.5 times as long as wide, 4-6 suboval, 7 subpentangular and 8-10 subquadrate, 4-10 slightly transverse and larger distally, 7 about 1.11 times as wide as long; 9 about 1.15 times as wide as long; 11 about 1.64 times as long as wide. Pronotum transversely subhexagonal, more or less convex medially and deplanate laterally, covered with coarse punctures; lateral margins more or less serrate; widest around middle, about 1.5 times as wide as long, about 1.3 times as wide as and 1.2 times as long as head; anterior and posterior margins weakly crenulate, anterior margin almost straight and posterior one more or less arcuate; anterior angles rounded and posterior ones more or less obtusely angulate; elytra more or less flat, covered with coarse punctures; lateral margins almost straight with weak crenulation and slightly dilated posteriorly; about 1.1 times as wide as long, about 1.5 times as wide as and 1.8 times as long as pronotum; posterior margin truncate. Male. Abdominal tergite VIII with more or less emarginate posterior margin; more or less sclerotized setae present on medial part of sternite VII; posterior margin of sternite VIII roundedly emarginate weakly. Aedeagus trilobed and almost symmetrical; median lobe narrowed apically with acute apex, rather sclerotized, lateral margin almost straight, much longer than basal bulb and paramere, dorsal surface covered with few scattered punctures; paramere more or less stout, more or less curved inwardly in apical half, sparsely punctate. Female. Abdominal tergite VIII with narrowly truncate posterior margin; posterior margin of sternite VIII more or less prolonged with rounded apex.

Specimens examined: KOREA: Chungbuk Prov.: Cheongju-si, Heungdeok-gu, Biha-dong, Mt.

Bumosan, N36°38′4.8″ E127°24′43.1″ 172 m, 29.iv.2009, Y.H. Kim, Y.G. Ban, S.G. Lee, sweeping

[165♂♂144♀♀ (4♂♂2♀♀ on slide), CNUIC]; same data except for under bark (1♀, CNUIC); Chungnam Prov.: Nonsan-si, Beolgok-myeon, Surak-ri, Mt. Daedunsan, Surak-valley, N36°08′04.2″ 34 Insect Fauna of Korea·Omaliinae

E127°18′29.1″ 362 m, 19.iv.2013, S.G. Lee, J.S. Lee, M.A. Cho, leaf litter (1♂, CNUIC); Jeju Prov.: Je- ju-si, Chuja-myeon, Is. Hachujado, 22.viii.2002, Y.B. Cho [original label as ‘Korea, Jejudo Chujado

Island (hachujado) 22.viii.2002, Y.B. Cho’] (1♀, CNUIC).

Distribution: Korea (South), Japan.

22. Eudectus rufulus Weise, 1877 (Pls. 2F, 15A-H)

Eudectus giraudi var. rufulus Weise, 1877: 96. Eudectus rufulus: Weise, 1884: 270; Sharp, 1889: 473; Nakane, 1971: 83; Zerche, 1988: 362; 1990: 146; 1993: 343; Watanabe, 1990: 353; 2013: 77; Herman, 2001: 402; Smetana, 2004: 254; Kim and Ahn, 2014a: 174.

Description: Body length 2.4-2.6 mm (head to abdominal end). Body more or less convex and parallel-sided, covered with coarse punctures and pubescence; yellowish brown to brown, more or less glossy. Head transversely pentagonal, coarsely and sparsely punctate, about 1.6 times as wide as long; eye about 2.1 times as long as temple; distance between ocelli about 2.0 times as long as distance between outside of ocellus and inner margin of eye; antenna relatively short and stout, gradually incrassate distally, reaching to posterior margin of pronotum, antennomeres 1-5 more or less glossy; scape robust, about 1.4 times as long as wide; pedicel suboval, about 1.2 times as long as wide, slightly narrower but rather shorter than scape; antennomere 3 about 1.1 times as long as wide, 4-8 subpentangular and 9-10 subquadrate, 4-10 transverse and larger distally; 4 about 1.36 times as wide as long; 7 about 1.35 times as wide as long; 9 about 1.24 times as wide as long; 11 about 1.41 times as long as wide. Pronotum transversely subhexagonal, more or less convex medially and deplanate laterally, covered with coarse punctures; lateral margins more or less serrate; widest around anterior two fifth, about 1.5 times as wide as long, about 1.3 times as wide as and as long as head; anterior and posterior margins crenulate weakly; anterior margin almost straight and posterior one more or less arcuate, anterior angles rounded and posterior one more or less obtusely angulate; elytra more or less flat, covered with coarse punctures, lateral margins almost straight with weak crenulation and slightly dilated posteriorly; about 1.2 times as wide as long, about 1.4 times as wide as and 1.8 times as long as pronotum; posterior margin truncate. Male. Abdominal tergite VIII with more or less emarginate posterior margin; more or less sclerotized setae present on medial part of sternite VII; posterior margin of sternite VIII weakly and roundedly emarginate. Aedeagus trilobed and almost symmetrical; median lobe slightly shorter than basal bulb and paramere, lateral margin in basal three fourths almost straight and parallel- sided, apical fourth narrowed with acute apex; paramere more or less stout, curved inwardly in apical two thirds, sparsely punctate. Female. Abdominal tergite VIII with more or less rounded posterior margin; posterior margin of sternite VIII more or less prolonged with rounded apex.

Specimens examined: KOREA: Gangwon Prov.: Pyeongchang-gun, Jinbu-myeon, Mt. Odaesan,

Sangwonsa, 15.ix-14.xi.2001, K.J. Ahn, C.W. Shin, ex FIT (1♀, CNUIC); Chungnam Prov.: Daejeon- si, Seo-gu, Jangan-dong, Mt. Jangtaesan, N36°13′03.3″ E127°20′36.2″ 258 m, 28.iii.2012, D.H. Lee, T.K.

Kim, S.G. Lee, leaf litter (1♂1♀, CNUIC); Gyeongnam Prov.: Geoje-si, Dongbu-myeon, Geoje Nat- ural Recreation Forest, N34°47′16.9″ E128°37′23.4″ 213 m, 14.iv.2011, Y.H. Kim, sifting, flood debris Coleoptera: Staphylinidae: Eusphalerum 35

[3♂♂1♀ (2♂♂1♀ on slide), CNUIC].

Distribution: Korea (South), Japan.

Tribe Eusphalerini Hatch, 1957

Eusphalerini Hatch, 1957: 82; Watanabe, 1990: 179; Newton and Thayer, 1992: 58; Newton et al., 2000: 338. Anthobiates Mulsant and Rey, 1880: 290; Newton and Thayer, 1992: 58. Anthobiini Portevin, 1929: 450; Newton and Thayer, 1992: 58. Type genus: Eusphalerum Kraatz, 1857. 6 species in 1 genus recorded in Korea.

Genus Eusphalerum Kraatz, 1857

Eusphalerum Kraatz, 1857: 1003; Hatch, 1957: 82; Zanetti, 1987: 46; Watanabe, 1990: 179; Downie and Arnett, 1996: 438; Newton et al., 2000: 338. Abinothum Tottenham, 1939: 225; Zanetti, 1987: 56. Onibathum Tottenham, 1939: 225; Hatch, 1957: 82; Zanetti, 1987: 56. Pareusphalerum Coiffait 1959: 216, 248; Zanetti, 1987: 152. Type species: Anthobium triviale Erichson. 6 species recorded in Korea.

Diagnosis: Body spindle-shaped, covered with more or less coarse punctures; dorsal tentorial pits present in front of ocelli; eye large and protruded, with very short setae among facets; temple short; ocelli present; nuchal area very weakly constricted; gular sutures divergent posteriorly; antenna gradually incrassate distally, antennomere 10 almost as wide as long; mandible subtriangular and edentate, molar and scissorial area fused, medial surface of molar with grinding cones; maxillary palpomere 4 almost as wide as 3; mesocoxal cavities separated; tarsomeres 1-4 short and broad, long setae densely present on ventral surface; tarsomere 5 as long as or slightly longer than basal four combined; tergite VII with apical palisade fringe.

Key to the species of the genus Eusphalerum

1. Head, pronotum and elytra brown to dark brown, abdomen brownish black; medial region of male metaventrite with group of serial punctures, covered with coriaceous microsculpture; U-shaped sclerite present in basal bulb of aedeagus ······························································· E. merkli - Head, pronotum and elytra yellow to brownish yellow; medial region of male metaventrite without serial minute punctures, but covered with fine micro-sculpture indistinctly; aedeagus without sclerite ·········································································································································· 2

2. Meso- and metaventrite yellow to brownish yellow, abdomen sexual dimorphic (male brown to dark brown and female yellow to brownish yellow); pronotum more or less finely punctate, covered with fine microsculpture; female elytra with remarkably prolonged apex; medial region of male metaventrite smooth; paratergite III with oblique carina ··································· E. mahunkai - Meso- and metaventrite dark brown, abdomen dark brown to black in both sexes; pronotum 36 Insect Fauna of Korea·Omaliinae

more or less coarsely punctate, covered with coarse microsculpture; female elytra without distinct prolonged part; medial region of male metaventrite with two or three dark deep punctures; paratergite III without carina ··················································································································· 3 3. Head reddish yellow; posterior margin of female elytra oblique; median lobe almost as long as paramere, middle of lateral margin almost straight, apical fifth gradually narrowed apically with more or less acute apex ·········································································································· E. delyi - Occiput dark; posterior margin of female elytra truncate; median lobe shorter than paramere, middle of lateral margin more or less weakly narrowed apically, apical fifth abruptly narrowed apically with more or less blunt apex ················································································ E. steinmanni

23. Eusphalerum (Eusphalerum) delyi Zanetti, 1993 (Pls. 2G, 16A-E)

Eusphalerum delyi Zanetti, 1993: 53; Herman, 2001: 422.

Eusphalerum (Eusphalerum) delyi: Smetana, 2004: 256.

Description: Body length 2.4-2.6 mm (head to abdominal end). Head transversely trapezoidal, more or less coarsely but not densely punctate, covered with microsculpture, about 1.6 times as wide as long; a pair of shallow and oblique depressions present between antennal insertion; eye about 3.2 times as long as temple; ocelli distinct and more or less large, distance between them about 1.3 times as long as distance between outside of ocellus and inner margin of eye; antenna reaching to posterior margin of pronotum, basal five antennomeres lustrous and remainder lusterless and darker; scape and pedicel suboval, longer than wide; antennomere 3 subconical, 4-6 subglobular, 7-10 subtetragonal; scape robust, about 1.5 times as long as wide, pedicel more or less robust, about 1.4 times as long as wide, slightly narrower and shorter than scape; antennomere 3 slightly dilated apically, about 1.5 times as long as wide, 4-5 slightly longer than wide, 6-10 relatively wider but not longer, 11 about 1.4 times as long as wide. Pronotum subrounded and transversely rectangular, rather coarsely punctate, covered with microsculpture, more or less convex, each lateral part of posterior third deplanate; widest at anterior two fifths, about 1.7 times as wide as long, about 1.3 times as wide as and as long as head; anterior margin slightly sinuate, posterior margin weakly arcuate; lateral margin arcuate; anterior angles rounded broadly and posterior ones more or less angular; elytra more or less flat, coarsely punctate, without microsculpture; lateral margin almost straight, slightly dilated posteriorly, about 1.4 times as wide as pronotum; mesoventral process long with acute apex. Abdomen broad and flat, punctate finely, covered with fine microsculpture; pair of patches of wing-folding spicules present around middle of tergite IV-V, those on IV larger and transverse. Male. Metaventrite with two or three darken pits around middle; mesotibia almost straight; abdominal tergite VIII with posterior margin emarginate broadly; posterior margin of sternite VIII roundedly and broadly emarginate. Aedeagus: median lobe gradually narrowed apically with more or less acute apex; paramere slightly shorter than median lobe, apical region slightly expanded with numerous apical setae; lateral margin almost straight; inner lateral margin curved at basal region. Female. Elytra slightly longer than male with more oblique posterior margin; metaventrite simple; mesotibia straight without granules; abdominal tergite VIII and sternite VIII narrowed posteriorly with narrowly truncate posterior margin. Coleoptera: Staphylinidae: Eusphalerum 37

Specimens examined: Korea: Gangwon Prov.: Hongcheon-gun, Nae-myeon, Mt. Gyebangsan,

N37°42′49.4″ E128°26′39.4″ 1155 m, 2.vi.2009, T.K. Kim, J.H. Song, flower (2♂♂2♀♀, CNUIC); Mt.

Gyebangsan, 37°43′49.0″ E128°27′24.3″ 1493 m, 2.vi.2009, C.W. Shin, sweeping (1♂, CNUIC); Pyeo- ngchang-gun, Jinbu, Mt. Odae, Sangwonsa, 18.v-23.vi.2002, S.J. Park, C.W. Shin, ex FIT (3♂♂3♀♀, CNUIC); Jinbu-myeon, Dongsan-ri, Mt. Odaesan, Sangwonsa, 4.vi-22.vi.2001, K.-J. Ahn, S.-J. Park,

M.-S. Kim, M.-J. Jeon, ex FIT (5♂♂1♀, CNUIC).

Distribution: Korea, Russia (Far East).

24. Eusphalerum (Eusphalerum) mahunkai Zanetti, 1993 (Pls. 2H, 16F-J)

Eusphalerum mahunkai Zanetti, 1993: 58; Herman, 2001: 435.

Eusphalerum (Eusphalerum) mahunkai: Smetana, 2004: 258.

Description: Body length 2.2-2.6 mm (head to abdominal end). Head transversely trapezoidal, finely and sparsely punctate, covered with fine microsculpture, about 1.7 times as wide as long; pair of shallow and oblique depressions present between antennal insertions; eye about 4.4 times as long as temple; ocelli distinct, distance between them about 1.3 times as long as distance between outside of ocellus and inner margin of eye; antenna reaching to middle of pronotum, basal six antennomeres lustrous and remainder more or less lusterless, weakly darker in apical part; scape and pedicel ovoid, antennomere 3 subconical, 4-6 subglobular, 7-10 semispherical, scape robust, 1.6 times as long as wide; pedicel more or less robust, slightly longer than wide; antennomere 3 slightly dilated apically, about 1.8 times as long as wide, 4-6 weakly widened, but 4-5 almost same in length although 5 slightly longer than others, 7-10 widened but almost same in length; 11 about 1.5 times as long as wide. Pronotum transversely subtetragonal, finely punctate, covered with fine microsculpture, slightly convex, each lateral part of posterior third deplanate; widest near middle, about 1.5 times as wide long, 1.3 times as wide as and 1.4 times as long as head; anterior and posterior margins slightly arcuate; lateral margin arcuate; anterior angles rounded, posterior one more or less obsoletely angular; elytra more or less flat, more or less coarsely punctate, without microsculpture; lateral margin almost straight, slightly dilated posteriorly; mesoventral process more or less long and rather slender with acute apex. Abdomen broad and flat, finely punctate, covered with fine microsculpture; paratergite III with oblique carina; pair of patches of wing-folding spicules present just before posterior margin of tergites IV-V, those on IV larger and transverse. Male. Abdomen dark brown to black except apical two segments; elytra almost as wide as long, with oblique posterior margin; mesotibia almost straight, aligned granules present longitudinally on inner surface of apical third; abdominal tergite VIII with truncate posterior margin; sternite VIII with weakly emarginate posterior margin, four dark bumps present on just before posterior margin, each bump with brown seta. Aedeagus: median lobe narrowed apically with more or less acute apex, lateral margin almost straight; paramere almost as long as median lobe with four apical setae, basal third slightly curved inwardly. Female. Abdomen brownish yellow; elytra slightly longer than wide, posterior margin distinctly prolonged; mesotibia straight without granules; abdominal tergite VIII narrowed posteriorly with truncate posterior margin; sternite VIII narrowed posteriorly with more or less rounded posterior margin. 38 Insect Fauna of Korea·Omaliinae

Specimens examined: Korea: Gangwon Prov.: Hongcheon-gun, Nae-myeon, Mt. Gyebangsan,

N37°42′49.4″ E128°26′39.4″ 1155 m, 2.vi.2009, T.K. Kim, J.H. Song, flower (2♂♂2♀♀, CNUIC);

Mt. Gyebangsan, 37°43′49.0″ E128°27′24.3″ 1493 m, 2.vi.2009, C.W. Shin, sweeping (1♂, CNUIC);

Pyeongchang-gun, Jinbu, Mt. Odae, Sangwonsa, 18.v-23.vi.2002, S.J. Park, C.W Shin, ex FIT (3♂♂ 3♀♀, CNUIC); Jinbu-myeon, Dongsan-ri, Mt. Odaesan, Sangwonsa, 4.vi-22.vi.2001, K.-J. Ahn, S.-J.

Park, M.-S. Kim, M.-J. Jeon, ex FIT (5♂♂1♀, CNUIC); Sangwonsa, 30.iv-4.vi.2001, K.-J. Ahn, S.-J.

Park, M.-S. Kim, M.-J. Jeon, ex FIT (1♂, CNUIC); Sangwonsa, N37°47′7.0″ E128°33′53.2″ 919 m,

31.v.2008, T.K. Kim, ex Deutzia glabrata (1♀, CNUIC); Sangwonsa temple, 18.vi.2004, S.J. Park, ex

FIT (2♂♂, CNUIC); Mt. Odaesan, Dongpigol, 26.vi-30.v.2012, S.J. Park, I.J. Heo, FIT (3♂♂3♀

♀, CNUIC); Dongpigol, 30.v-28.vi.2012, S.J. Park, I.J. Heo, FIT (3♂♂, CNUIC); Chungnam Prov.:

Geumsam-gun, Mt. Daedunsan, 24.v.2001, K.-J. Ahn, ex on flowers (1♂, CNUIC); Gyeongbuk

Prov.: Tanyang-gun, Sobaeksan, Chŏndong Area, 8-9.v.1999, U.-S. Hwang, H.-J. Kim, ex sifting (1♂, CNUIC).

Distribution: Korea, Russia (Far East).

25. Eusphalerum (Eusphalerum) merkli Zanetti, 1993 (Pls. 2I, 17A-F)

Eusphalerum merkli Zanetti, 1993: 50; Herman, 2001: 437.

Eusphalerum (Eusphalerum) merkli: Smetana, 2004: 258.

Description: Body length 2.7-3.1 mm (head to abdominal end). Head transversely trapezoidal, more or less coarsely and sparsely punctate, covered with microsculpture, about 1.7 times as wide as long; pair of shallow and oblique depressions present between antennal insertions; eye about 3.5 times as long as temple; ocelli distinct and more or less large, distance between them about 1.6 times as long as distance between outside of ocellus and inner margin of eye; antenna gradually incrassate apically, reaching to posterior margin of pronotum, basal five antennomeres lustrous and remainder lusterless and darker; scape and pedicel ovoid, antennomere 3 subconical, 4-5 subglobular, 6-7 pentagonal, 8-10 tetragonal; scape robust, about 1.6 times as long as wide; pedicel more or less robust, about 1.4 times as long as wide, slightly narrower and shorter than scape; antennomere 3 slightly dilated apically, about 1.7 times as long as wide, 4-5 slightly longer than wide, 5 slightly larger than 4; 6-10 gradually widened but almost equal in length, 11 about 1.4 times as long as wide. Pronotum transversely subtetragonal, more or less coarsely punctate, covered with microsculpture, more or less convex, each lateral part of posterior third deplanate; widest near middle, about 1.5 times as wide as long, about 1.3 times as wide as and 1.4 times as long as head; anterior margin slightly arcuate, posterior margin weakly sinuate; lateral margin arcuate; anterior angles broadly rounded and posterior ones more or less angular; elytra more or less flat, coarsely punctate, without microsculpture; lateral margin almost straight, slightly dilated posteriorly, slightly wider than long, about 1.5 times as wide as and 2.1 times as long as pronotum; posterior margin truncate; mesoventral process more or less long and sturdy with blunt apex. Abdomen broad and flat, finely punctate, covered with fine microsculpture; pair of patches of wing-folding spicules present around middle of tergite IV-V, those on IV larger and transverse. Male. Mesotibia slightly curved inwardly on apical fourth, aligned granules present longitudinally on inner surface of apical half. Abdominal tergite VIII with posterior margin weakly emarginate triangularly; posterior margin of sternite VIII roundedly and deeply emarginate. Aedeagus: Coleoptera: Staphylinidae: Eusphalerum 39 median lobe narrowed apically in basal third, apical two thirds almost parallel-sided with more or less blunt apex; paramere almost as long as median lobe, apical region slightly expanded with numerous apical setae; lateral margins almost straight or sinuate weakly, inner lateral margin slightly bent around basal region. Female. Metaventrite simple; mesotibia straight without granules; tergite VIII with truncate posterior margin; sternite VIII narrowed apically with more or less pointed apex, latero-posterior margin weakly sinuate.

Specimens examined: Korea: Gangwon Prov.: Hongcheon-gun, Bukbang-myeon, 25.iv.2004, J.K.

Jeong, St.4 sweeping (1♂, CNUIC); Nae-myeon, Mt. Gyebangsan, N37°42′49.4″ E128°26′39.4″ 1155 m, 2.vi.2009, T.K. Kim, J.H. Song, flower (1♂, CNUIC); Pyeongchang-gun, Mt. Odaesan, 25.v.2004,

S.J. Park, ex FIT (1♂, CNUIC); Mt. Odaesan, N37°47′03″ E128°33′55″, 9.v-25.v.2004, S.-J. Park, S.-M.

Choi, D.-H. Lee, ex FIT (1♂, CNUIC); Jinbu-myeon, Dongsan-ri, Mt. Odaesan, Dongpigol, 26.iv-

30.v.2012, S.J. Park, I.J. Heo, FIT (3♂♂1♀, CNUIC); Dongpigol, 30.v-28.vi.2012, S.J. Park, I.J. Heo,

FIT (3♂♂, CNUIC); Mt. Odaesan, Sangwonsa, 4.vi-22.vi.2001, K.-J. Ahn, S.-J. Park, M.-S. Kim, M.-

J. Jeon, ex FIT (2♀, CNUIC); Sangwonsa, 30.iv-4.vi.2001, K.-J. Ahn, S.-J. Park, M.-S. Kim, M.-J. Jeon, ex FIT (2♀♀, CNUIC). Distribution: Korea.

26. Eusphalerum (Eusphalerum) reitteri (Bernhauer, 1935)

Anthobium reitteri Bernhauer, 1935: 39 Eusphalerum reitteri: Zanetti, 1993: 49; Herman 2001: 451.

Eusphalerum (Eusphalerum) reitteri: Tikhomirova, 1973b: 137; Smetana, 2004: 260.

Distribution: Korea (North), Russia.

Remarks: We could not study Korean specimens but cited this species based on Zanetti (1993).

27. Eusphalerum (Eusphalerum) steinmanni Zanetti, 1993 (Pls. 2J, 17G-K)

Eusphalerum steinmanni Zanetti, 1993: 52; Herman, 2001: 459.

Eusphalerum (Eusphalerum) steinmanni: Smetana, 2004: 260.

Description: Body length 2.1-2.4 mm (head to abdominal end). Head transversely trapezoidal, sparsely and coarsely punctate, covered with microsculpture, about 1.6 times as wide as long; eye about 3.6 times as long as temple; ocelli distinct, distance between them about 1.5 times as long as distance between outside of ocellus and inner margin of eye; antenna reaching to posterior margin of pronotum, basal five antennomeres lustrous and remainder lusterless and darker; scape and pedicel ovoid, antennomere 3 subconical, 4-6 subglobular, 7-10 subtetragonal; scape robust, about 1.8 times as long as wide; pedicel more or less robust, about 1.5 times as long as wide; antennomere 3 slightly dilated apically, about 1.5 times as long as wide, 4-5 slightly longer than wide, 40 Insect Fauna of Korea·Omaliinae

5 slightly larger than 4; 6-10 gradually widened but almost equal in length, 11 about 1.4 times as long as wide. Pronotum transversely subtetragonal, more or less coarsely punctate, covered with microsculpture, more or less convex, each lateral part of posterior third deplanate; widest near middle, about 1.5 times as wide as long, about 1.3 times as wide as and 1.4 times as long as head; anterior margin slightly arcuate, posterior margin weakly sinuate; lateral margin arcuate; anteri- or angles broadly rounded and posterior ones more or less angular; elytra more or less flat, with coarse punctures, without microsculpture; lateral margin almost straight, slightly dilated posteriorly, slightly wider than long, about 1.5 times as wide as and 2.1 times as long as pronotum; posterior margin truncate; mesoventral process more or less long and sturdy with blunt apex. Abdomen broad and flat, finely punctate, covered with fine microsculpture; tergite II and paratergite II more or less well sclerotized; pair of patches of wing-folding spicules present around middle of tergite IV-V, those on IV larger and transverse; intercoxal process of middle of sternite III more or less indistinct. Male. Mesotibia slightly curved inwardly on apical fourth, aligned granules present longitudi nally on inner surface of apical half. Abdominal tergite VIII with posterior margin triangularly and weakly emarginate; posterior margin of sternite VIII roundedly and deeply emarginate. Aedeagus: median lobe narrowed apically in basal two third, apical third almost parallel-sided with blunt apex; paramere almost as long as median lobe, apical region slightly expanded with numerous apical setae; lateral margin almost straight or weakly sinuate, inner lateral margin slightly bent around basal region. Female. Elytra slightly longer than in males; metaventrite simple; mesotibia straight without granules; tergite VIII with truncate posterior margin; sternite VIII narrowed apically with more or less pointed apex, latero-posterior margin weakly sinuate.

Specimens examined: Korea: Gangwon Prov.: Hongcheon-gun, Nae-myeon, Mt. Gyebangsan,

N37°42′49.4″ E128°26′39.4″ 1155 m, 2.vi.2009, T.K. Kim, J.H. Song, flower (2♂♂2♀♀, CNUIC); Mt.

Gyebangsan, N37°43′49.0″ E128°27′24.3″ 1493 m, 2.vi.2009, C.W. Shin, sweeping (1♂, CNUIC); Py- eongchang-gun, Jinbu, Mt. Odae, Sangwonsa, 18.v-23.vi.2002, S.J. Park, C.W. Shin, ex FIT (3♂♂ 3♀♀, CNUIC). Distribution: Korea.

28. Eusphalerum (Eusphalerum) szeli Zanetti, 1993

Eusphalerum szeli Zanetti, 1993: 54; Herman 2001: 461.

Eusphalerum (Eusphalerum) szeli: Smetana, 2004: 260.

Distribution: Korea (North).

Remarks: We could not study Korean specimens but cited this species based on Zanetti (1993). Coleoptera: Staphylinidae: Acruliopsis 41

Tribe Omaliini MacLeay, 1825

Omaliini MacLeay, 1825; Hatch, 1957: 76; Watanabe, 1990: 64; Newton et al., 2000: 335.

Arpediomimini Cameron, 1917b: 277 (new name for Arpediopsini); Newton and Thayer, 1995: 293. Arpediomiminae: Blackwelder, 1944: 101.

Arpediopsini Cameron, 1917a: 123 (preoccupied type genus); Newton and Thayer, 1992: 58. Micralymmini Mulsant and Rey, 1880: 3; Portevin, 1929: 443; Newton and Thayer 1995: 293. Micralymmates Mulsant and Rey, 1880: 3. Tetradelini: Newton and Thayer, 1992: 59; Newton and Thayer, 1995: 293. Tetradeli Fauvel, 1904: 90. Tetradelina: Jakobson, 1908: 453. Type genus: Omalium Gravenhorst, 1802. 2 species in 2 genera recorded in Korea.

Key to the genera of the tribe Omaliini in Korea

1. Pronotum convex medially, lateral margin strongly crenulate ·········································· Acruliopsis - Pronotum more or less flat, lateral margin smooth or weakly crenulate ···························· Omalium

Genus Acruliopsis Zerche, 2003

Acruliopsis Zerche, 2003b: 299; Kim and Ahn, 2014b: 151. Type species: Acruliopsis watanabei Zerche, 2003. 1 species recorded in Korea.

Diagnosis: Body more or less convex and parallel-sided, covered with coarse punctures and pubescence; maxillary palpomere 4 almost as wide as and about 3.0 times as long as 3; antennae relatively short and gradually incrassate distally; eyes large and protruding, ocular ridge surrounding eyes; ocelli distinct and widely apart; gular sutures divergent posteriorly; pronotum convex medially and transverse, lateral margin crenulate; mesocoxal cavities separated; abdominal tergite VII with apical palisade fringe; sternite III with conspicuous intercoxal process, transverse carina present and anterior half beyond carina impressed.

29. Acruliopsis ussuriensis Zerche, 2003 (Pls. 2K, 18A-F)

Acruliopsis ussuriensis Zerche, 2003b: 305; Kim and Ahn, 2014a: 151.

Description: Body length 2.3-2.6 mm (head to abdominal end). Body brown to dark reddish brown and lustrous, appendages yellow to reddish brown, anterior part of pronotum and humeral region of elytra weakly brighter. Head broad, pentagonal, sparsely and coarsely punctate, about 1.3 times as wide as long; eye about 2.3 times as long as temple; distance between ocelli about 1.8 times as wide as distance between outside of ocellus and inner margin of eye; antenna reaching to anterior third of elytra; basal five antennomeres lustrous and remainder lusterless; scape robust, about 1.8 times as long as wide; pedicel ovoid, about 1.4 times as long as wide; antennomere 3 slen- 42 Insect Fauna of Korea·Omaliinae der, slightly dilated apically, 1.3 times as long as wide, 4-5 ovoid, almost same in length and shape each other, about 1.4 times as long as wide; 6 subglobular, slightly longer than wide; 7-9 subpentagonal, slightly shortened and widened distally, about 1.06-1.20 times as wide as long; 10 trapezoidal, about 1.3 times as wide as long, slightly shorter than 9; 11 about 1.3 times as long as wide. Pronotum transversely subhexagonal, convex medially and deplanate laterally, covered with punctures much coarser than those of head; lateral margin sinuate with crenulation, widest near middle, 1.6 times as wide as than long, about 1.4 times as wide as and 1.2 times as long as head; anterior margin almost straight, posterior margin arcuate; anterior angles obtuse and posterior ones more or less angular; posterior third of deplanate area more or less depressed; elytra more or less convex laterally, coarsely and densely punctate, about 1.3 times as wide as long, about 1.2 times as wide as and 1.5 times as long as pronotum; posterior margin truncate, lateral margin crenulate excluding posterior fourth; prosternal process long and acute with short carina longitudinally; ventral surface of middle tibia with about five or six granules arranged; ventral surface of metatibia roundedly and shallowly excavated in apical two thirds. Abdomen finely and sparsely punctate, surface with dense reticulate microsculpture; tergite IV with pair of transverse oval patches of wing-folding spicules. Male. Abdominal tergite VIII narrowed posteriorly with truncate but weakly emarginate posterior margin; pair of small and obtuse processes present on posterior third of sternite VI, projecting postero-ventrally; conspicuous and acute processes present just before posterior margin of sternite VII, projecting postero-ventrally with apical setae, distance between them almost twice as wide as distance on sternite VI; sternite VIII narrowed posteriorly, more or less extended triangularly. Ae- deagus trilobed; median lobe robust, gently narrowed apically with rounded apex; paramere little longer than median lobe, apical half of paramere constricted and curved inwardly, apical part expanded and inner surface roundedly excavated.

Specimens examined: KOREA: Gangwon Prov., Inje-gun, Girin-myeon, Jindong-ri, Mt. Jeom- bongsan, 18.iv.2007, Y.H. Kim, under bark (1♂, CNUIC); Pyeongchang-gun, Jinbu-myeon, Dong- san-ri, Mt. Odaesan, Sangwonsa, 16.viii-15.ix.2001, S.-J. Park, C.-W. Shin, ex FIT (1♂, CNUIC).

Distribution: Korea (South), Russia (Far East).

Genus Omalium Gravenhorst, 1802

Omalium Gravenhorst, 1802: 111; Hatch, 1957: 80; Zanetti, 1987: 205; Watanabe, 1990: 88; Downie and Arnett, 1996: 437; Newton et al., 2000: 337; Kim and Ahn, 2014b: 152. Type species: Staphylinus rivularis Paykull, 1789. 1 species recorded in Korea.

Diagnosis: Body more or less depressed above, elongate and parallel-sided, covered with more or less coarse punctures; oblique short furrow or depression present in front of each ocellus; maxillary palpomere 4 almost as wide as and about 2.0 times as long as 3; mentum with pair of long setae on each side of posterior fourth; antenna gradually incrassate distally, antennomeres 8-10 transverse; pronotum with paired longitudinal depressions on posterior third; mesoventrite with longitudinal carina along midline; mesocoxal cavities separated; metatarsomere 5 longer than basal four combined; abdominal tergite VII with apical palisade fringe. Coleoptera: Staphylinidae: Omalium 43

30. Omalium japonicum Sharp, 1874 (Pls. 2L, 19A-G, 20A-G)

Omalium japonicum Sharp, 1874: 98; Nakane, 1971: 82; Watanabe, 1990: 95; 2013: 79; Shibata and Watanabe, 1999: 265; Herman, 2001: 517; Smetana, 2004: 263; Kim and Ahn, 2014b: 153.

Description: Body length 2.7-3.2 mm (head to abdominal end). Body dark brown, elytra and appendages yellowish brown to reddish brown. Head subpentagonal, covered with scattered coarse punctures, about 1.4 times as wide as long; eye about 3.8 times as long as temple; distance between outside of ocellus and inner margin of eye about 1.3 times as wide as distance between ocelli; antenna reaching to posterior margin of pronotum, basal five antennomeres lustrous and remainder lusterless; scape robust, about 1.8 times as long as wide; pedicel ovoid, about 1.4 times as long as wide, relatively shorter and slightly narrower than scape; antennomere 3 more or less slender, slightly dilated apically, about 1.6 times as long wide, 4-5 subglobular, almost as wide as long; 6-10 subpentagonal and transverse, larger distally; 6-7 about 1.1 times as wide as long; 8-10 about 1.2 times as wide as long; 11 about 1.5 times as long as wide. Pronotum transversely subquadrate; lateral margin arcuate, widest at anterior third, about 1.4 times as wide as long, 1.3 times as wide as and as long as head; anterior margin almost straight, posterior margin arcuate; anterior angles subrounded and posterior ones more or less angular; scutellum heart-shaped, covered with scattered punctures and indistinct microsculpture; elytra covered with punctures and pubescence, lateral margin straight and almost parallel-sided, posterior margin truncate, slightly wider than long, 1.2 times as wide as and 1.6 times as long as pronotum; all tarsi with basal four combined shorter than tarsomere 5, metatarsomere 5 about 1.4 times as long as basal four combined. Abdomen subparal- lel; pair of suboval patches of wing folding spicules present on tergite IV. Male. Protarsus more or less wide; abdominal tergite VIII narrowed posteriorly, posterior margin weakly emarginate; sternite VIII narrowed posteriorly, posterior margin broadly emarginate; aedeagus trilobed and symmetrical, median lobe more or less slender, swollen around middle; paramere shorter than median lobe, curved inwardly, lateral part rolled, apical part membranous with four apical setae. Female. Abdominal tergite VIII narrowed posteriorly with truncate posterior margin; sternite VIII narrowed posteriorly with truncate posterior margin; spermatheca subglobular with attached tubule; accessory sclerite widest at anterior third and narrowed posteriorly with blunt apex, medial part opened like inverted heart-shape, posterior half longitudinally carinate.

Specimens examined: KOREA: Gangwon Prov.: Samcheok-si, Wondeok-eup, Hosan-ri, 28.iv.1985,

Y.S. Kim, under seaweed (1♂, CNUIC); Chungbuk Prov.: Yeongdong-gun, Hwanggan-myeon,

N36°11′23.8″ E127°53′44.3″ 248 m, 18.v.2011, T.K. Kim, sifting, decaying food (52♂♂38♀♀ in EtOH, CNUIC); Chungnam Prov.: Gongju-si, Banpo-myeon, Mt. Gyeryongsan, N36°21′17.5″ E127°

14′55.6″, 26.iv.2005, J.S. Park, S.I. Lee, food garbage [6♂♂1♀ (1♂1♀ on slides; 4♂♂ in EtOH), CNUIC]; Gongju-si, Janggi-myeon, N36°29′25.1″ E127°14′11.3″ 70 m, 8.v.2010, S.G. Lee, J.H. Jeon, food garbage [5♂♂2♀♀ (1♂ on slide; 4♂♂2♀♀ in EtOH), CNUIC]; Seosan-si, Unsan-myeon, Yonghyeon-valley, N36°45′5.7″ E126°36′28″ 170 m, 16.iv.2009, Y.H. Kim, J.H. Song, fungus on log and leaf litter [3♀♀ (1♀ on slide; 2♀♀ in EtOH), CNUIC]; Unsan-myeon, Mt. Illaksan, N36°44′

29.2″ E126°35′6.3″ 123 m, 16.iv.2009, J.H. Song, S.G. Lee, carrion (2♂♂ in EtOH, CNUIC); Jeonbuk Prov.: Gochang-gun, Haeri-myeon, Goseong-ri, N35°26′40.7″ E126°33′0.6″, 1.v.2007, T.K. Kim, Y.H.

Kim, under manure [1♂3♀♀ (1♂ on slide; 3♀♀ in EtOH), CNUIC]; Jeonnam Prov.: Gurye-gun,

Mt. Jirisan, Piagol, 24-26.v.2000, H.-K. Choi, J.-H. Song and M.-S. Kim, ex bait trap (1♀, CNUIC); 44 Insect Fauna of Korea·Omaliinae

Yeonggwang-gun, Baeksu-eup, Hasa-ri, N35°15′46.4″ E126°21′22.1″ 15 m, 2.v.2007, T.K. Kim, under manure (1♂ in EtOH, CNUIC); Hasa-ri, shell heap (1♀ in EtOH, CNUIC); Gyeongbuk Prov.: Ulsan- city Mt. Kaji-san, 10-15.v.1999, Y.B. Cho coll. ex bait trap (1♂2♀♀, CNUIC); Gyeongnam Prov.:

Jinju-city, Gajoa-dong, Gyeongsang Univ., 13.iv.2003, C.S. Lim, ex bait (1♂, CNUIC); Gyeongsang

Univ., 27.iv.2003, C.S. Lim, ex bait (2♂♂, CNUIC); Gyeongsang Univ., 3.v.2003, C.S. Lim, ex bait (1♂,

CNUIC); Gyeongsang Univ., 19.ix.2003, C.S. Lim, ex bait (1♀, CNUIC); Sachoen, Guam, 5.v.1986,

K.S. Lee, decayed fish (1♀, CNUIC); Jeju Prov.: Namjeju-gun, Pyoseon-myeon, Gasi-ri, 18.iv.1985,

K.S. Lee (1♀, CNUIC); Gasi-ri, 18.iv.1985, K.S. Lee, fish (1♂1♀, CNUIC); Jeju-si, Jocheon-eup,

Seongpanak, 15.v.1985, KS. Lee, litter (1♀, CNUIC); Seoguipo-si, Dongheung-dong, Jeongbang- pokpo, 29.x.1985, K.S. Lee, decayed vegetable (1♀, CNUIC); Seoguipo, 700, 28.xi.1984, K.S. Lee, rot- ten wood (1♂, CNUIC); Seoguipo, 29.xi.1984, K.S. Lee, cow dung (1♀, CNUIC); Seoguipo, 2.iv.1986,

K.S. Lee, straw (1♂, CNUIC).

Distribution: Korea (South), Japan. Literature Cited 45

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Dôgo of the Oki Islands, West Japan. Elytra, Tokyo 32(1): 71-77. Watanabe Y (2013) Subfamily Omaliinae MacLeay, 1825. In: Shibata Y, Maruyama M (eds) Catalogue of Japa- nese Staphylinidae (Insecta: Coleoptera). Bulletin of the Kyushu University Museum 11: 73-80. Weise J (1877) Japanische Staphilinidae und Pselaphidae. Deutsche Entomol-ogische Zeitschrift 21: 88-100. Weise J (1884) Ueber Eudectus rufulus n. sp. Aus Japan. Deutsche Entomologische Zeitschrift 28: 270-271. Welch RC (1993) Ovariole development in Staphylinidae (Coleoptera). Invertebrate Reproduction and Develop- ment 23: 225-234. Yuh JH, Paik WH, Kwon YJ, and Lee SM (1985) Check List of Rove Beetles from Korea (Coleoptera: Staphy linidae). Insecta Koreana 5: 223-255. Zanetti A (1987) Fauna d’Italia, Coleoptera, Staphylinidae, Omaliinae. Calderini, Bologna, 472 pp. Zanetti A (1993) Contribution to the knowledge on Eastern Palaearctic Eusphalerum Kraatz with descriptions of new species (Coleoptera, Staphylinidae: Omaliinae). Annales Historico-Naturales Musei Nationalis Hungarici 85: 47-63. Zerche L (1988) Die Typen der von Julius Weise (1844-1925) beschriebenen Staphylinidae_Arten (Coleoptera). Beiträge zur Entomologie 38(2): 361-364. Zerche L (1990) Monographie der paläarktischen Coryphiini (Coleoptera, Staphylinidae, Omaliinae). Akademie der Landwirtschaftswissenchaften der Deutschen Demokratischen Republik, Berlin, 413 pp. Zerche L (1993) Monographie der paläarktischen Coryphiini (Coleoptera, Staphylinidae, Omaliinae), Supple- mentum 1. Beitäge zur Entomologie 43(2): 319-374. Zerche L (2003a) Arten der Hygrogeus-Gruppe aus dem Fernen Osten Russlands, aus Japan und China (Cole- optera, Staphylinidae, Omaliinae, Anthophagini), (Beiträge zur Kenntnis ostpaläarktischer Insekten; 13). Beitraege zur Entomologie 53(2): 277-295. Zerche L (2003b) Acruliopsis gen. n. aus der Ostpaläarktis (Coleoptera, Staphylinidae, Omaliinae, Omaliini), (Beiträge zur Kenntnis ostpaläarktischer Insekten; 14). Beiträge zur Entomologie 53(2): 297-316. 50 Insect Fauna of Korea·Omaliinae

Plates

A B C D

E F G H

I J K L

Plate 1. A. Camioleum choi, 3.7 mm; B. Geodromicus abdominalis, 5.2 mm; C. G. beibienkoi, 3.8 mm; D. G. kirchenblati, 3.2 mm; E. G. lestevoides, 3.1 mm; F. Lesteva cordicollis, 3.8 mm; G. L. coreana, 3.4 mm; H. L. distincta, 4.0 mm; I. L. miyabi, 3.9 mm; J. Olophrum mutatum, 3.8 mm; K. Trigonodemus koreanus, 4.4 mm; L. Archaeoboreaphilus macrothorax, 3.8 mm. Plates 51

A B C D

E F G H

I J K L

Plate 2. A. Archaeoboreaphilus rubromaculatus, 3.6 mm; B. Boreaphilus graciliformis, 3.5 mm; C. B. japonicus, 3.0 mm; D. B. temporalis, 2.9 mm; E. Eudectus japonicus, 2.6 mm; F. E. rufulus, 2.5 mm; G. Eusphalerum delyi, 2.5 mm; H. E. mahunkai, 2.3 mm; I. E. merkli, 2.9 mm; J. E. steinmanni 2.2 mm; K. Acruliopsis ussuriensis, 2.6 mm; L. Omalium japonicum, 2.8 mm. 52 Insect Fauna of Korea·Omaliinae

D E

×2 C

Plate 3. Geodromicus abdominalis. A. antenna; B. pronotum (dorsal aspect); C. male sternite VIII

(ventral aspect); D. aedeagus (dorsal aspect); E. aedeagus (lateral aspect). Scales: A, B, D, E=0.5 mm; C=0.1 mm. From Kim et al. (2008). Plates 53

D E

Plate 4. Geodromicus beibienkoi (A-C). A. pronotum (dorsal aspect); B. male front tarsus (lateral aspect); C. male sternite VIII (ventral aspect). G. lestevoides; D. pronotum (dorsal aspect). G. kirchenblati; E. pronotum (dorsal aspect). Scales: A, D, E=0.5 mm, B, C=0.1 mm. From Kim et al. (2008). 54 Insect Fauna of Korea·Omaliinae

D C

E F G

Plate 5. Lesteva cordicollis. A. antenna; B. scutellum (dorsal aspect); C. elytron (ventral aspect); D. metaventrite (ventral aspect); E. metatibia, pubescence omitted (anterior aspect); F. aedeagus (dorsal aspect); G. aedeagus (lateral aspect). Scales: A, C-G=0.3 mm, B=0.1 mm. From Kim and Ahn (2011). Plates 55

C E

Plate 6. Lesteva coreana. A. antenna; B. scutellum (dorsal aspect); C. elytron (ventral aspect); D. aedeagus (dorsal aspect); E. aedeagus (lateral aspect). Scales: A, C-E=0.3 mm, B=0.1 mm. From Kim and Ahn (2011). 56 Insect Fauna of Korea·Omaliinae

D C

E F

Plate 7. Lesteva distincta. A. antenna; B. scutellum (dorsal aspect); C. elytron (ventral aspect); D. metaventrite (ventral aspect); E. aedeagus (dorsal aspect); F. aedeagus (lateral aspect). Scales: A,

C-F=0.3 mm, B=0.1 mm. From Kim and Ahn (2011). Plates 57

E F

Plate 8. Lesteva miyabi. A. antenna; B. scutellum (dorsal aspect); C. elytron (ventral aspect); D. metatibia, pubescence omitted (anterior aspect); E. aedeagus (dorsal aspect); F. aedeagus (lateral aspect). Scales: A, C-F=0.3 mm, B=0.1 mm. From Kim and Ahn (2011). 58 Insect Fauna of Korea·Omaliinae

B C

G A D

E F

J I H

Plate 9. Olophrum mutatum. A. antenna; B. left mandible (dorsal aspect); C. right mandible (dorsal aspect); D. meso- and metaventrite (ventral aspect); E. male tergite VIII (dorsal aspect); F. male sternite VIII (ventral aspect); G. aedeagus (dorsal aspect); H. aedeagus (lateral aspect); I. female tergite

VIII (dorsal aspect); J. female sternite VIII (ventral aspect). Scales: A, D=0.3 mm, B, C, E-J=0.1 mm. Plates 59

B A D

H E F

Plate 10. Trigonodemus koreanus. A. antenna; B. left elytron (dorsal aspect); C. male tergite VIII (dorsal aspect); D. male sternite VIII (ventral aspect); E. aedeagus (dorsal aspect); F. aedeagus (lateral aspect); G. female tergite VIII (dorsal aspect); H. female sternite VIII (ventral aspect). Scales: A, B=0.3 mm, C-H=0.1 mm. From Kim and Ahn (2008). 60 Insect Fauna of Korea·Omaliinae

A D

I G

Plate 11. Archaeoboreaphilus macrothorax. A. antenna; B. pronotum (dorsal aspect); C. elytron (dorsal aspect); D. male sternite VII (ventral aspect); E. male tergite VIII (dorsal aspect); F. male sternite VIII

(ventral aspect); G. male sternite IX (ventral aspect); H. aedeagus (dorsal aspect); I. aedeagus (lateral aspect). Scales: A-I=0.3 mm. From Kim and Ahn (2012). Plates 61

G H

A C

E F D

Plate 12. Archaeoboreaphilus rubromaculatus. A. antenna; B. pronotum (dorsal aspect); C. elytron

(dorsal aspect); D. male tergite VIII (dorsal aspect); E. male sternite VIII (ventral aspect); F. male sternite IX (ventral aspect); G. aedeagus (dorsal aspect); H. aedeagus (lateral aspect). Scales:

A-F=0.3 mm. From Kim and Ahn (2012). 62 Insect Fauna of Korea·Omaliinae

A C

B D

E G

F H

I K

J L

Plate 13. Boreaphilus graciliformis (A-D). A. head (dorsal aspect); B. antenna; C. pronotum (dorsal aspect); D. elytron (dorsal aspect). B. japonicus (E-H); E. head (dorsal aspect); F. antenna; G. pronotum (dorsal aspect); H. elytron (dorsal aspect). B. temporalis (I-L); I. head (dorsal aspect); J. antenna;

K. pronotum (dorsal aspect); L. elytron (dorsal aspect). Scales: A-L=0.1 mm. Plates 63

A D E

G B C F

H I

K J L M

Plate 14. Eudectus japonicus. A. labrum (dorsal aspect); B. right mandible (ventral aspect); C. left mandible (ventral aspect); D. left maxilla (ventral aspect); E. labium and mentum (ventral aspect); F. antenna; G. prothorax (ventral aspect); H. male tergite VIII (dorsal aspect); I. male sternite VIII (ventral aspect); J. female tergite VIII (dorsal aspect); K. female sternite VIII (ventral aspect); L. aedeagus

(dorsal aspect); M. aedeagus (lateral aspect). Scales: A-M=0.1 mm. From Kim and Ahn (2014a). 64 Insect Fauna of Korea·Omaliinae

C D

E F H

Plate 15. Eudectus rufulus. A. antenna; B. prothorax (ventral aspect); C. male tergite VIII (dorsal aspect); D. male sternite VIII (ventral aspect); E. female tergite VIII (dorsal aspect); F. female sternite VIII (ventral aspect); G. aedeagus (dorsal aspect); H. aedeagus (lateral aspect). Scales: A-H=0.1 mm. From Kim and Ahn (2014a). Plates 65

A B D E

F J G I

Plate 16. Eusphalerum delyi (A-E). A. male left elytron (dorsal aspect); B. female right elytron (dorsal aspect); C. male tergite VIII (dorsal aspect); D. male sternite VIII (ventral aspect); E. aedeagus

(dorsal aspect). E. mahunkai (F-J); F. male left elytron (dorsal aspect); G. female right elytron (dorsal aspect); H. male tergite VIII (dorsal aspect); I. male sternite VIII (ventral aspect); J. aedeagus (dorsal aspect). Scales: A-J=0.1 mm. 66 Insect Fauna of Korea·Omaliinae

A B E F

×3 C

G H J K

Plate 17. Eusphalerum merkli (A-F). A. male left elytron (dorsal aspect); B. female right elytron (dorsal aspect); C. male meso- and metaventrites with right mesoleg (ventral aspect); D. male tergite

VIII (dorsal aspect); E. male sternite VIII (ventral aspect); F. aedeagus (dorsal aspect). E. steinmanni (G-K); G. male left elytron (dorsal aspect); H. female right elytron (dorsal aspect); I. male tergite VIII (dorsal aspect); J. male sternite VIII (ventral aspect); K. aedeagus (dorsal aspect). Scales: A-K=0.1 mm. Plates 67

A C

F D E

Plate 18. Acruliopsis ussuriensis. A. pronotum (dorsal aspect); B. male tergite VIII (dorsal aspect); C. male sternites VI-VII (ventral aspect); D. male sternite VIII (ventral aspect); E. aedeagus (dorsal aspect); F. aedeagus (lateral aspect). Scales: A-F=0.1 mm. From Kim and Ahn (2014b). 68 Insect Fauna of Korea·Omaliinae

F A

D E G B

Plate 19. Omalium japonicum. A. labrum (dorsal aspect); B. left maxilla (ventral aspect); C. labium

(ventral aspect); D. mentum (ventral aspect); E. antenna; F. scutellum (dorsal aspect); G. elytron

(dorsal aspect). Scales: A-G=0.1 mm. From Kim and Ahn (2014b). Plates 69

A E

B F

C D H

Plate 20. Omalium japonicum. A. male tergite VIII (dorsal aspect); B. male sternite VIII (ventral aspect); C. aedeagus (dorsal aspect); D. aedeagus (lateral aspect); E. female tergite VIII (dorsal aspect);

F. female sternite VIII (ventral aspect); G. spermatheca; H. accessary sclerite (dorsal aspect). Scales:

A-H= 0.1 mm. From Kim and Ahn (2014b). 70 Insect Fauna of Korea·Omaliinae

Index to Scientific Names

A G

Acidota 10 Geodromicus 13 crenata 10 abdominalis 13 Acruliopsis 41 beibienkoi 14 ussuriensis 41 caliginosus 15 Anthophagini 10 kirchenblati 15 Archaeoboreaphilus 27 lestevoides 16 macrothorax 27 rubromaculatus 28 L

B Lesteva 17 cordicollis 17 Boreaphilina 27 coreana 18 Boreaphilus 29 distincta 19 graciliformis 30 miyabi 20 japonicus 30 okiana 21 temporalis 31

O C Olophrum 22 Camioleum 11 mutatum 22 choi 11 Omaliini 41 Coryphiina 32 Omalium 42 Coryphiini 26 japonicum 43

E T

Eudectus 32 Trigonodemus 23 japonicus 33 koreanus 23 rufulus 34 Eusphalerini 35 Eusphalerum 35 U delyi 36 mahunkai 37 Uenohadesina 25 merkli 38 styx 25 reitteri 39 steinmanni 39 szeli 40 Number 21

Insect Fauna of Korea Vol. 12, No. 21 Omaliinae NIBR