Zootaxa 4532 (4): 503–522 ISSN 1175-5326 (print edition) https://www.mapress.com/j/zt/ Article ZOOTAXA Copyright © 2018 Magnolia Press ISSN 1175-5334 (online edition) https://doi.org/10.11646/zootaxa.4532.4.3 http://zoobank.org/urn:lsid:zoobank.org:pub:FEA9DAAC-4E25-459B-A31B-B73794F2EF22 Review of the Metipocregyes Breuning, 1939 with two new combinations and three new species (Coleoptera, Cerambycidae, , )

JUNSUKE YAMASAKO1,3 & MEI-YING LIN2 1Division of Informatics and Inventory, Institute for Agro-Environmental Sciences, NARO, 3–1–3 Kannondai, Tsukuba, Ibaraki, 305– 8604 Japan 2Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, 1–5 Beichen West Road, Chaoyang, Beijing 100101, China. 3Correspondence author. E-mail: [email protected]

Abstract

The genus Metipocregyes Breuning, 1939 is reviewed. Hypocacia fruhstorferi Breuning, 1959 and H. wenhsini Yamasako & Chou, 2013 are transferred to Metipocregyes. Three new species of Metipocregyes are described; M. brunneatus sp. nov. from Vietnam, M. holzschuhi sp. nov. from Laos, and M. variabilis sp. nov. from China. With these taxonomic acts, Metipocregyes is comprised of seven species and an identification key for them is presented. The habitus, male genitalia, and name-bearing types of all species in this study are figured.

Key words: Coleoptera, Cerambycidae, Lamiinae, Mesosini, , Oriental region

Introduction

Metipocregyes Breuning, 1939 is a small genus of the tribe Mesosini Mulsant, 1839 (Coleoptera, Cerambycidae, Lamiinae). It was established by Breuning (1939) based on a single species, Mesosa nodieri Pic, 1933 from Vietnam. Subsequently, two species from Laos, M. rondoni Breuning, 1965 and M. affinis Breuning, 1968, were added to the genus (Breuning 1965, 1968). Of those members, M. rondoni was recently transferred to the genus Anipocregyes Breuning, 1939 by Yamasako & Makihara (2017) with a replacement name, A. albifrons Yamasako & Makihara, 2017. Prior to this study, the genus was comprised of only two species from Vietnam and Laos, and the original generic concept had never been reviewed since its establishment by Breuning (1939). The work of Yamasako & Makihara (2017), however, necessitated a review of the genus Metipocregyes, and in the course of the studies on Mesosini, taxonomic confusion was recognized between Metipocregyes and the genus Hypocacia Breuning, 1935. Our study on the genus also resulted in discovery of three unknown species from China, Laos, and Vietnam. After close examination, we concluded that they were congeneric with Metipocregyes although some features did not match the original definition of the genus. Herein, we review Metipocregyes and partly expand its definition to resolve taxonomic confusion and describe three new species from China, Laos, and Vietnam.

Material and methods

This study was based on dried specimens preserved in the following institutions and private collections: Bernice P. Bishop Museum, Honolulu, USA (BPBM); Ehime University Museum, Matsuyama, Japan (EUMJ); Forschungsinstitut und Naturmuseum Senckenberg, Frankfurt-am-Main, Germany (SMF); Institute of Zoology, Chinese Academy of Sciences, Beijing, China (IZAS); Muséum national d'Histoire naturelle, Paris, France (MNHN); Museum für Naturkunde, Berlin, Germany (MNHUB); National Museum of Natural Science, Taichung, Taiwan (NMNS); Osaka Museum of Natural History, Osaka, Japan (OMNH); Forestry and Forest Products

Accepted by G. Nearns: 28 Nov. 2018; published: 20 Dec. 2018 503 Research Institute, Tsukuba, Japan (FFPRI); National Museum of Natural History (Smithsonian Institution), Washington, DC, USA (NMNH); and private collections of Xavier Gouverneur, Rennes, France (CXG); Carolus Holzschuh, Villach, Austria (CCH); Bin Liu, Bin Taxonomy Studio, Beijing, China (BITS); Tatsuya Niisato, Tokyo, Japan (CTN); Tomáš Tichý, Ostrava, Czech Republic (CTT); Shigeo Tsuyuki, Zushi, Japan (CST); and the first author, Tsukuba, Japan (CJY). Verbatim label data are provided for the name-bearing types, of which data on each label are cited in double quotation marks (“ ”) with a slash (/) indicating the line break. The observational method, terminology, and abbreviations of the endophallus mainly follow Yamasako & Ohbayashi (2011), but petroleum jelly was used to inflate endophalli in this work. The abbreviations used in the present paper for endophallus are as follows: APH: apical phallomere; BPH: basal phallomere; CS: crescent shaped sclerites; CT: central trunk; ED: ejaculatory duct; LSp: large spicules; MPH: median phallomere; MSp: micro spicules; MT: medial tube; PB: pre-apical bulb; and SSp: small spicules. [The term “phallomer” was proposed for endophallic subdivision of Cerambycidae by Danilevsky et al. (2005), and has been followed by subsequent authors (Kasatkin, 2006; Yamasako & Ohbayashi, 2011; etc.), but it might be misspelling of “phallomere”. We therefore modified the term here.] Measurements of various body parts are coded as follows: LB = length of body, from the tip of vertex to elytral apex; LE = length of elytra, from the basal margin to the apex along suture; LG = length of gena, from the upper margin to the lower margin; LL = length of lower eye lobe, from the upper margin to the lower margin; LP = length of pronotum, from the basal to the apical margin along the suture; WB = maximum width across body; WEH = width across elytral humeri; WL = width of lower eye lobe near middle; WP = maximum width across pronotum. The number of measured specimens is shown in parentheses at the beginning of the description for each sex.

Systematics

Genus Metipocregyes Breuning, 1939

Metipocregyes Breuning, 1939: 429.

Type species. Mesosa nodieri Pic, 1933

Redescription. Body 10.1–19.0 mm, moderate in size or relatively small among the genera of Mesosini. Eye subdivided into upper and lower lobes connected posteriorly by narrow line with/without single row of ommatidia, or deeply emarginate and the lobes connected posteriorly by 2–4 rows of ommatidia; lower lobe large, prominent, somewhat vertically long. Antennal tubercle gently elevated. Antenna moderately thick, fringed with suberect hairs beneath antennomeres, gradually sparser and shorter toward apical segment; antennomere I thick and short, subequal to or slightly shorter than antennomeres III and IV respectively, gently thickened apically, with cicatrix on apex of outer side; antennomere III slightly longer than IV. Pronotum transverse, gently swollen laterally, with/ without rudimentary projection anterolaterally, with pair of indistinct swellings on disk, weakly constricted and transversally depressed near base and apex. Prosternal process with slightly ridged lateral margins, rounded in lateral view. Mesosternal process with ridged lateral margins forming pair of small projections near apex, nearly truncate in lateral view. Elytron with long suberect hairs throughout, somewhat projected anteriorly beside scutellum, slightly raised longitudinally behind base; humerus subquadrate and slightly expanded laterally; apical margin arcuate with sub-quadrate inner angles. Mesotibia simple, without distal notch at outer margin. Male genitalia with tegmen wide in dorsal view; paramere somewhat thick. Endophallus 2.5–4.0 times as long as median lobe, subdivided into BPH, MPH (delimited into MT+CT and PB), and APH, but APH almost fused and swollen together with distal part of PB. MPH with MT+CT long, about twice length of median lobe, bent at distal half, with MSp and LSp; PB elongate, cylindrical, with SSp. APH undeveloped, with single ED usually on dorsal side, sometimes with rudimental AA on distal part. MSp indistinct, mainly distributed in proximal 2/3 of MT+CT; LSp uni-dentate, small, distributed in distal 1/5–1/3 of MT+CT; SSp unidentate, minute, covered most area of PB and proximal area of APH. Remarks. The genus Metipocregyes had been defined mainly by the following features since its establishment (modified Breuning, 1939): Body elongate. Eye subdivided; lower lobe slightly longer than wide. Antennal

504 · Zootaxa 4532 (4) © 2018 Magnolia Press YAMASAKO & LIN tubercle slightly elevated. Antenna robust, scarcely longer than body, fringed with long hairs; antennomere I long, with developed cicatrix; antennomere III distinctly longer than I and IV. Pronotum transverse, with slightly distinct transverse furrow. Elytra long, rounded apically, roundly projected forward at middle of each base. Prosternal process weakly projected below, rounded in lateral view. Mesosternal process with tubercle at middle, truncate at anterior margin. Legs short and thick; mesotibia without distal notch.

Metipocregyes nodieri (Pic, 1933) (Figs 1–4, 29–30, 43–44, 53–60)

Mesosa nodieri Pic, 1933: 14. Metipocregyes nodieri: Breuning, 1939: 429.

Type locality. Dong Van, Ha Giang Prov., Vietnam. Type material examined. Syntype: ♀ (MNHN, Figs 43–44), “D’. Nodir / Dong-Van”, “Longic. / 68”, “Type”, “Mesosa / nodieri / n sp”. Other materials examined. 1♀ (CJY, Figs 3–4, 30), Mt. Tam Dao, Vinh Phu Prov., Vietnam, 5–10. VI, 1995, T. Kurihara coll.; 1♂ (CTN), same locality but 26. V, 1999, H. Karube leg.; 1♂ (IZAS, Figs 1–4, 29, 53–60), Huayudong, Hekou, Yunnan Prov., China, 4. IV, 2010, Yang Xiaodong leg., IOZ(E)1906090, B10Y0069; 1♀ (BITS), Dayao-shan (Mt.), Pingban Tun, Daojiang Village, Changdong Township, Jinxiu County, Laibin City, Guangxi Prov., China, 24°6'12.92"N/110°11'00.65"E, Alt. 1,223 m, 16. VI. 2015, Jinteng Zhao coll.; 1♂1♀ (BITS), Dayao-shan (Mt.), Pingzhao Village, Jinxiu Township, Jinxiu County, Laibin City, Guangxi Prov., China, 24°7'03.52"N/110°13'0.957"E, Alt. 886 m, 17. VI. 2015, Jinteng Zhao coll.; 1♀ (BITS). Dayao-shan (Mt.), Pingban Tun, Daojiang Village, Changdong Township, Jinxiu County, Laibin City, Guangxi Prov., China, 24°6'27.20"N/110°11'07.93"E, Alt. 1,223 m, 19. VI. 2015, Jinteng Zhao coll. Redescription. Male (n = 3, Figs 1–2, 29): LB = 11.0–13.0 mm, WB = 4.5–5.2 mm. Body black, with long sparse suberect black and partly white hairs on dorsal surface, beneath antennomeres, and legs. Head, pronotum, and elytra mostly with black pubescence, spotted with whitish and/or yellowish cream white pubescence which are concentrated and formed wide vague transverse band in apical 1/4 of elytra. Antenna without tuft of hairs; antennomere I sparsely spotted with white pubescence; antennomere II, each basal part of III– VII, and entire part of VIII–X with white pubescence, and the remainders with black pubescence. Ventral surface clothed with whitish and/or light yellowish pubescence intermixed with sparse white hairs. Legs with femora irregularly spotted with whitish and/or light yellowish pubescence; tibiae with same pubescence on basal and middle parts. Eye subdivided into upper and lower lobes which are connected posteriorly by narrow line without ommatidium, LL/WL = 1.2–1.4, LL/LG = 1.2–1.4. Antenna 1.3–1.4 times as long as body length; relative lengths of each antennomere from I to XI as follows: 1.5 : 0.3–0.4 : 1.9–2.0 : 1.3–1.4 : 0.9–1.0 : 0.8 : 0.7–0.8 : 0.6 : 0.6 : 0.5–0.6 : 0.4–0.5; antennomeres III and VI slightly dilated inwardly at each apex. Pronotum LP/WP = 0.7, WP/ WEH = 0.7, constricted and transversally depressed near base and apex, with pair of obtuse indistinct swellings on disk. Elytra LE/BL = 0.7, LE/WEH = 1.7, LE/LP = 3.4–3.6, almost parallel-sided on basal 3/4, arcuately narrowed and rounded apically; disk with sparse granules on base, irregularly with fine punctures which are rough, distinct in basal half and reduced apically. Male genitalia as in Figs 53–60. Tegmen in dorsal view widest behind middle, gently curved in lateral view; paramere in dorsal view thick, ca. 1/4 length of tegmen, gently and arcuately narrowed toward rounded apex, with setae arising from apical half on latero-dorsal side and concentrated apically; ringed part in dorsal view expanded laterally behind middle of tegmen, thence gently narrowed basally. Median lobe in dorsal view thick, gently curved in lateral view; apex of ventral plate bluntly pointed; basal strut dehiscent from near middle of median lobe. Endophallus almost 3.5 times as long as median lobe; BPH subequal to half-length of median lobe, with pair of CS; MPH with MT+CT curved near distal 1/3, with MSp and LSp; PB cylindrical in proximal 2/3, roundly swollen together with APH in distal 1/3, with SSp; APH short, with AA on dorsal side and ED on AA; MSp minute, sparsely arranged in proximal 3/4 of MT+CT; LSp small, unidentate, evenly and densely distributed on distal 1/4 of MT+CT; SSp minute, densely covered dominant area of PB, somewhat sparser in proximal part. Female (n = 4, Figs 3–4, 30): similar to male. LB = 12.0–16.6 mm, WB = 4.8–6.4 mm. Body relatively thick.

REVIEW OF THE GENUS METIPOCREGYES Zootaxa 4532 (4) © 2018 Magnolia Press · 505 Lower eye lobe relatively small, LL/WL = 1.2–1.3, LL/LG = 1.0–1.1. Antenna relatively thick and short, 0.9–1.2 times as long as body length; relative lengths of each antennomere from I to XI as follows: 1.7–2.1 : 0.4–0.5 : 2.3– 2.5 : 1.6–1.7 : 1.0–1.2 : 0.6–0.7 : 0.5–0.6 : 0.4–0.5 : 0.3–0.4 : 0.3 : 0.2–0.3; antennomere IX–XI with black pubescence.

FIGURES 1–8. Habitus of Metipocregyes spp. 1–4, M. nodieri; 5–8, M. affinis; 1–2, 5–6, male; 3–4, 7–8, female; 1, 3, 5, 7, dorsal view; 2, 4, 6, 8, lateral view.

506 · Zootaxa 4532 (4) © 2018 Magnolia Press YAMASAKO & LIN Diagnosis. This species is distinguishable from other congeners by the following features: head, pronotum, and elytra mostly with black pubescence, spotted with white and yellowish pubescence which are concentrated and formed a wide vague transverse band in apical 1/4 of elytra; antenna without tuft of hairs. Distribution. North Vietnam (Ha Giang and Vinh Phu), South China (Guangxi and Yunnan). Remarks. This is the type species of this genus. Prior to this work, it was known only from the type locality. This is the first record from China and a new locality in Vietnam.

Metipocregyes affinis Breuning, 1968 (Figs 5–8, 31–32, 45–46, 61–67)

Metipocregyes affinis Breuning, 1968: 7.

Type locality. Phou Khao Khoay (Mt.), Vientiane Prov., Laos Type material examined. Holotype: ♀ (BPBM, Figs 45–46), “LAOS: / Vientiane Prov. / Phou Kou Khouei / 20.VI.1965”, “J. A. Rondon / Collection / BISHOP Mus.”, “Metipocregyes / affinis mihi / Breuning dét. Typ”, “metipocregyes / affinis n. sp. Breun / Coll. J. A. Rondon Laos”. Specimens examined. [Laos]: 1♀ (CJY), Ban Saleui, Xam Neua Dist., Houa Phan Prov., Alt. ca 1,000 m, 3. V, 2002, N. Ohbayashi leg.; 1♀ (CJY, Figs 7–8, 32), same locality and collector, Alt. ca 1,400 m, 5. V, 2002; 1♀ (CJY), same data; 1♂ (CTN, Figs 5–6, 31, 61–67), Phou Pan (Mt.), Houa Phan Prov., Alt. 1,500–1,800 m, 20˚11’N/104˚01’E, 5. V, 2004, T. Tsuru leg.; 1♂ (CTN), same locality, 25. V, 2004, T. CTN.; 20♀♀ (CJY), Phou Samsoum (Mt.), Xieng Khouang Prov., IV–VI, 2006, H. Wakahara coll. [Thailand]: 1♀ (CCH), Doi Pui, Chiang Mai Prov., 25. V, 1985, Native collector; 1♂ (CST), Doi Pui, Chiang Mai Prov., 18–22. V, 1987, T. Hirasawa leg.; 1♂ (FFPRI), Maetaeng, Chiang Mai Prov., 6. V, 1993. Redescription. Male (n = 10, Figs 5–6, 31): LB = 10.1–12.6 mm, WB= 3.9–4.8 mm. Body color variable from black to reddish dark brown, sparsely with long suberect black hairs on dorsal surface, beneath antennomeres, femora, and tibiae. Head, pronotum, and elytra irregularly with small spots of whitish pubescence which are variable from grayish to yellowish creamy white. Antenna with antennomeres I–V with white pubescence except for apical part of antennomeres I and III–V which are covered with black or brown pubescence; antennomeres VI–XI usually with white pubescence, but sometimes with black or brown pubescence entirely or apically. Ventral surface and legs with same whitish pubescence as dorsal ones, partly with black or brown pubescence, sparsely with white hairs. Eye subdivided into upper and lower lobes which are connected posteriorly by narrow line with or without row of ommatidia, LL/WL = 1.1–1.3, LL/LG = 1.1–1.3. Antenna 1.3–1.4 times as long as body length; relative lengths of each antennomere from I to XI as follows: 1.4–1.5 : 0.2–0.3 : 1.8–1.9 : 1.4–1.5 : 1.0–1.1 : 0.8–0.9 : 0.7–0.8 : 0.6–0.7 : 0.6 : 0.5–0.6 : 0.5. Pronotum LP/WP = 0.6–0.7, WP/WEH = 0.7–0.8, constricted and transversally depressed near base and apex, with pair of obtuse indistinct swellings on middle of disk. Elytra LE/LB = 0.7, LE/ WEH = 1.8–1.9, LE/LP = 3.3–4.0, almost parallel-sided in basal 3/4, arcuately narrowed and rounded apically; disk with several granules on base, irregularly with fine punctures which are rough and distinct in basal half and reduced apically. Male genitalia as in Figs 61–67. Tegmen in dorsal view widest behind middle, gently curved in lateral view; paramere in dorsal view thick, ca. 1/4 length of tegmen, gently and evenly narrowed toward rounded apex, with setae arising from apical half on latero-dorsal side and concentrated in apical area, and with short setae on base of ventral side; ringed part in dorsal view expanded laterally behind middle of tegmen, thence gently narrowed basally. Median lobe in dorsal view thick, gently curved in lateral view; apex of ventral plate roundly pointed; basal strut dehiscent near middle of median lobe. Endophallus almost 3.5 times as long as median lobe; BPH subequal to half-length of median lobe, with pair of CS; MPH with MT+CT curved near distal 1/3, with MSp and LSp; PB cylindrical in proximal 2/3, roundly swollen together with APH in distal 1/3, with SSp; APH short, with rudimentary AA on dorsal side and ED on AA; MSp minute, sparsely arranged in proximal 2/3 of MT+CT; LSp small, unidentate, evenly and densely distributed in distal 1/3 of MT+CT; SSp minute, densely covered dominant area of PB, somewhat sparser in proximal part.

REVIEW OF THE GENUS METIPOCREGYES Zootaxa 4532 (4) © 2018 Magnolia Press · 507 FIGURES 9–16. Habitus of Metipocregyes spp. 9–12, M. fruhstorferi comb. nov.; 13–16, M. wenhsini comb. nov. (13–14, holotype; 15–16, paratype); 9–10, 13–14, male; 11–12, 15–16, female; 9, 11, 13, 15, dorsal view; 10, 12, 14, 16, lateral view.

508 · Zootaxa 4532 (4) © 2018 Magnolia Press YAMASAKO & LIN FIGURES 17–20. Habitus of Metipocregyes brunneatus sp. nov. 17–18, Male, holotype; 19–20, female, paratype; 17, 19, dorsal view; 18, 20, lateral view.

Female (n = 10, Figs 7–8, 32): similar to male but body thicker. LB = 12.4–16.0 mm, WB = 4.6–6.1 mm. Antenna 0.9–1.0 times as long as body length; relative lengths of each antennomere from I to XI as follows: 1.9– 2.0 : 0.3–0.4 : 2.3–2.5 : 1.5–1.6 : 0.9–1.0 : 0.6–0.7 : 0.5 : 0.4–0.5 : 0.3–0.4 : 0.3 : 0.3. Diagnosis. This species is similar to M. nodieri, but distinguishable from the latter by: elytra more elongate, scattered with small spots of whitish pubescence throughout. Distribution. Laos (Vientiane, Xieng Khouang, and Houa Phan), North Thailand (Chiang Mai). Remarks. This is the first record from Thailand.

Metipocregyes fruhstorferi (Breuning, 1959), comb. nov. (Figs 9–12, 33–34, 47–48, 68–74)

Hypocacia fruhstorferi Breuning, 1959: 152.

Type locality. Tam Dao, Vinh Phu Prov., Vietnam. Type material examined. Holotype: ♀ (MNHUB, Figs 47–48): “Tonkin / Montes Manson / April,Mai 2- 3000’ / H. Fruhstorfer”, “Hypocacia / Fruhstorferi / mihi Typ/ Breuning dét.”, “Holotypus / Nr.”, “Zool. Mus. / Berlin”. Other material examined. [Vietnam]: 1♀ (CJY), Tam Dao, Vinh Phu Prov., V. 2007, J. Yamasako coll.; 1♂ (NMNH), Tam Dao National Park, Vinh Phuc Prov., 21°28.408’N/105°38.816’E, Alt. 955 m, VI. 2011, Long leg, OTIS Lab PIP Project, H. Nadel & S. Krishnankutty SEL 501, 2017. [Laos]: 1♂ (CCH), Phou Pan (Mt.), Ban Saleui, Houa Phan Prov., 20°12’N/104°01’E, Alt. 1,500–1,900 m, 23. IV. –15. V. 2008, Holzschuh leg.; 1♂ (CCH), same locality and collector, Alt. 1,300–1,900 m, 28. IV. 2010; 1♂ (CCH, Figs 9–10, 33, 68–74), same locality and collector, 1–15. V. 2010; 1♀ (CCH, Figs 11–12, 34), same locality and collector, 29. IV. 2011; 1♂ (CCH), same locality and collector, 14. V. 2011. Redescription. Male (n = 4, Figs 9–10, 33): LB = 13.0–14.5 mm, WB = 5.1–5.7 mm.

REVIEW OF THE GENUS METIPOCREGYES Zootaxa 4532 (4) © 2018 Magnolia Press · 509 FIGURES 21–28. Habitus of Metipocregyes spp. 21–24, M. holzschuhi sp. nov.; 25–28, M. variabilis sp. nov.; 21–22, 25–26, male, holotype; 23–24, 27–28, female, paratype; 21, 23, 25, 27, dorsal view; 22, 24, 26, 28, lateral view.

Body variable from black to dark brown or reddish dark brown, with suberect black hairs on dorsal surface, beneath antennomeres, femora, and tibiae. Head with sparse brown, light brown, and black pubescence of which light brown ones sometimes become lighter and whitish, with pair of indistinct striae of black or dark brown pubescence on frons, which extend to occiput through vertex and widened behind upper eye lobe. Pronotum clothed with brown and light brown pubescence, irregularly scattered with small black spots on disk. Antenna with same sparse pubescence as head or pronotum on antennomere I, with white pubescence on entire part of antennomere II, each basal area of III–VI, and V–XI except for each apex, and the remainders with sparse brown or

510 · Zootaxa 4532 (4) © 2018 Magnolia Press YAMASAKO & LIN black pubescence; antennomere IV with tuft of black hairs in apical half. Elytra clothed with black pubescence, scattered with dense small spots of white pubescence throughout, with small spots of brown pubescence on base and along suture, vague markings of same pubescence transversally near middle and apex. Legs with each femur with light brown and black pubescence; each tibia with light brown pubescence on middle and black ones on base and apex; tarsomeres I–II with whitish pubescence and III with black pubescence. Ventral surface clothed with same pubescence as head or pronotum. Eye nearly subdivided or deeply emarginate; upper and lower lobes connected posteriorly by 1–3 rows of ommatidia, LL/WL = 0.9–1.2, LL/LG = 0.9–1.2. Antenna 1.0–1.2 times as long as body length; relative lengths of each antennomere from I to XI as follows: 1.8–2.0: 0.3–0.4 : 1.9–2.0 : 1.5–1.6 : 0.9 : 0.7 : 0.6–0.7 : 0.5–0.6 : 0.5 : 0.4–0.5 : 0.5. Pronotum LP/WP = 0.8, WP/WEH = 0.6–0.7, with sparse fine umbilicated punctures on disk. Elytra LE/BL = 0.7, LE/WEH = 1.7, LE/LP = 3.0–3.2, evenly and slightly narrowed and rounded apically, with umbilicated punctures on base but the punctures reduced apically and almost disappeared in apical half. Male genitalia as in Figs 68–74. Tegmen in dorsal view widest before middle, gently curved in lateral view; paramere ca. 2/5 length of tegmen, thick, hardly narrowed toward rounded apex, with sparse setae mostly in apical 1/3 of latero-dorsal side, several short setae on base of ventral side. Median lobe in dorsal view thick, gently curved in lateral view; basal strut dehiscent from middle of median lobe; apex of ventral plate roundly pointed. Endophallus long, slightly shorter than quadruple length of medial lobe; BPH slightly longer than half-length of median lobe, with pair of CS; MPH with MT+CT long, curved and weakly swollen ventrally near distal 1/4; PB long, swollen together with APH in pyriform shape, with SSp; APH rudimentary, with ED on dorsal side and small AA on distal part; MSp minute, sparsely arranged in proximal 3/4 of MT+CT; LSp distributed in distal 1/4, small, unidentate, small except for dorsal area in which the spicules become large; SSp minute, densely covered dominant area of PB, somewhat sparser in proximal part. Female (n = 2, Figs 9–12, 34): very similar to male. LB = 12.0–13.0 mm, WB = 4.8–5.1 mm. Antenna 0.9–1.0 times as long as body length; relative lengths of each antennomere from I to XI as follows: 1.9–2.2 : 0.3 : 2.0–2.3 : 1.7–1.8 : 0.9–1.0 : 0.6 : 0.5–0.6 : 0.4 : 0.4 : 0.4 : 0.3. Diagnosis. This species is distinguishable from its congeners by: head and pronotum with brown, light brown and black pubescence; antenna with tuft of black hairs only on antennomere IV; elytra with black pubescence, scattered with dense small spots of white pubescence throughout, with small spots of brown pubescence and vague markings of same pubescence transversally near middle and apex. Distribution. North Vietnam (Vinh Phu), Northeast Laos (Houa Phan). Remarks. This species was originally described in the genus Hypocacia Breuning, 1935. However, it does not fit the definition of the genus due to its lower eye lobes being vertically long [Hypocacia: lower eye lobe transverse (Breuning 1935, 1939)]. In addition to this difference, it is also obviously different from the type species of the genus, H. biplagiata Breuning, 1935, especially in the following features: body robust, much larger; antenna relatively thick; antennomere I gently thickened apically; antennomere III slightly longer than I and IV; elytra projected anteriorly beside scutellum [H. biplagiata (Figs 49–52): body small; lower eye lobe transverse; antenna fine; antennomere I hardly thickened apically; antennomere III obviously longer than I and IV; elytra hardly projected at each base]. Our study shows it to be congeneric with the members of Metipocregyes in the external and male genital characteristics described above. Therefore, this species is transferred to Metipocregyes herein and Laos represents a new country record for the species.

Metipocregyes wenhsini (Yamasako & Chou, 2013), comb. nov. (Figs 13–16, 35–36, 75–81)

Hypocacia wenhsini Yamasako & Chou, 2013: 97. Hypocacia sp. 2: Chou, 2004: 376; 2008: 376.

Type locality. Shouka, Shihzih Township, Pingtung County, Taiwan. Type material examined. Holotype: ♀ (NMNS, Figs 13–14, 35, 75–91), Shouka, Shihzih Township, Pingtung County, Taiwan, 7. VII, 1999, W.-H. Lin leg. Paratype: 1♀ (CJY, Figs 15–16, 36), same locality as the holotype, 8. V, 2012, W.-I Chou leg. Diagnosis. Body relatively large, LB = 17.0 mm (male), 14.0–19.0 mm (female) (Yamasako & Chou, 2013), mainly clothed with yellowish ochre pubescence, scattered with small black spots. Antennomeres III and IV with

REVIEW OF THE GENUS METIPOCREGYES Zootaxa 4532 (4) © 2018 Magnolia Press · 511 tuft of black hairs at each apex, but the one on antennomere IV sometimes reduced. Elytra with transverse band of yellowish ochre pubescence at middle and transverse narrow black bands before and behind ochre one. Similar to M. fruhstorferi, but easily distinguishable from the latter by having more rotund body with yellowish pubescence. Distribution. Taiwan (Pingtung). Remarks. Although this species was described in the genus Hypocacia by Yamasako & Chou (2013), it is congeneric with Metipocregyes and very closely related to M. fruhstorferi. Therefore, this species is transferred to Metipocregyes. The detailed description of this species was provided and figured in Yamasako & Chou (2013).

Metipocregyes brunneatus sp. nov. (Figs 17–20, 37–38, 82–88)

Type locality. Bao Loc, Lam Dong Prov., Vietnam Type series. Holotype: ♂ (EUMJ, Figs. 17–18, 37, 82–88): “[South Vietnam] / Bảo Lộc / Lam Dong Prov. / 23–25. IV, 2000 / J. Yamasako coll.”. Paratypes: 1♂1♀ (CJY, Figs 19–20, 38), same locality and collector as the holotype, 5–7. V, 1999; 1♂ (CJY), same data as the holotype; 1♂1♀ (CST), same locality, 21–22. V, 2000, Masao Ito leg. Description. Male (n = 4, Figs 17–18, 37): LB = 13.8–15.8 mm, WB = 5.0–5.6 mm. Body dark brown except for antenna and legs which are reddish brown, or entirely reddish brown, with sparse black or brown hairs on dorsal surface, beneath antennomeres, and legs. Head, pronotum, elytra, and ventral surface clothed with brown pubescence, and partly spotted with white pubescence. Antenna with antennomere I partly clothed with same pubescence as head; antennomere II and each basal area of III–XI with light brown or white pubescence, and the remainders with brown pubescence. Elytra each scattered with small black spots, with markings of black pubescence arranged into transverse zigzag bands behind base and before and behind middle. Legs with each femur with brown and light brown or white pubescence; each tibia with same pubescence on base and middle; tarsomeres I–II and middle of claws with same pubescence; the remainders with brown pubescence. Eye deeply emarginate; upper and lower lobes connected posteriorly by 2–4 rows of ommatidia; lower lobe large, LL/WL = 1.1, LL/LG = 1.5–1.9. Antenna 1.2–1.3 times as long as body length; relative lengths of each antennomere from I to XI as follows: 1.6–1.7 : 0.3 : 2.0 : 1.3–1.4 : 0.9–1.0 : 0.8 : 0.7 : 0.6–0.7 : 0.6 : 0.5–0.6 : 0.4– 0.5; antennomeres III slightly dilated inwardly at apex. Pronotum LP/WP = 0.7, WP/WEH = 0.7, constricted near base and transversally depressed before apex, with granules on dorsal surface and pair of obtuse swellings on middle of disk. Elytra LE/LB = 0.7, LE/WEH = 1.9–2.0, LE/LP = 3.6–4.0, almost slightly and evenly narrowed toward apical 1/5, arcuately narrowed and rounded apically; disk granulate in basal 1/5, with punctures rough and distinct in basal half but reduced apically. Male genitalia as in Figs 82–88. Tegmen in dorsal view widest near middle, gently curved in lateral view; paramere in dorsal view thick, ca. 1/4 length of tegmen, gently and evenly narrowed toward rounded apex, with setae arising from apical half on latero-dorsal side and concentrated in apical area, and with short setae on base of ventral side; ringed part in dorsal view expanded laterally near middle of tegmen, thence gently narrowed basally. Median lobe in dorsal view thick, gently curved in lateral view; apex of ventral plate roundly pointed; basal strut dehiscent from just before middle of median lobe. Endophallus almost triple length of median lobe; BPH subequal to half-length of median lobe, with pair of CS; MPH with MT+CT curved near distal 1/4, with MSp and LSp; PB cylindrical in proximal 2/3, roundly swollen together with APH in distal 1/3, with SSp; APH short, with ED proximally, without AA; MSp minute, indistinct, very sparsely arranged in proximal 2/3 of MT+CT; LSp small, unidentate, densely distributed mainly in distal 1/3 of MT+CT; SSp minute, densely covered dominant area of PB, somewhat sparser in dorsal side of proximal part. Female (n = 2, Figs 19–20, 38): very similar to male. LB = 16.5–17.7 mm, WB = 6.2–6.7 mm. Antenna 1.0– 1.1 times as long as body length; relative lengths of each antennomere from I to XI as follows: 1.7–1.9 : 0.3–0.4 : 2.1–2.3 : 1.6–2.0 : 0.9–1.0 : 0.7 : 0.6 : 0.4–0.5 : 0.4 : 0.4 : 0.3–0.4. Diagnosis. This species is unique within the genus and easily distinguished from congeners by a combination of the following features: body clothed with brown pubescence; eye deeply emarginated and the lobes connected posteriorly by 2–4 rows of ommatidia; lower eye lobe large. Distribution. South Vietnam (Lam Dong). Etymology. The specific epithet is attributable to its dominant color of pubescence on the body surface.

512 · Zootaxa 4532 (4) © 2018 Magnolia Press YAMASAKO & LIN FIGURES 29–36. Head of Metipocregyes spp. in frontal view. 29–30, M. nodieri; 31–32, M. affinis; 33–34, M. fruhstorferi comb. nov.; 35–36, M. wenhsini comb. nov. (35, holotype; 36, paratype); 29, 31, 33, 35, male; 30, 32, 34, 36, female.

REVIEW OF THE GENUS METIPOCREGYES Zootaxa 4532 (4) © 2018 Magnolia Press · 513 FIGURES 37–42. Head of Metipocregyes spp. in frontal view. 37–38, M. brunneatus sp. nov.; 39–40, M. holzschuhi sp. nov.; 41–42, M. variabilis sp. nov.; 37, 39, 41, male, holotype; 38, 40, 42, female, paratype.

Metipocregyes holzschuhi sp. nov. (Figs 21–24, 39–40, 89–95)

Type locality. Phou Pan (Mt.), Ban Saleui, Xam Neua Dist., Houa Phan Prov., Laos. Type series. Holotype: ♂ (CCH, Figs 21–22, 39, 89–95), “NE · LAOS. Hua Phan prov/ Ban Saleui, Phou Pan (Mt.)/ –20°12’N, 10401’E/ 21. IV. 2012, 1300–1900 m/ leg. C. Holzschuh” [printed on white label]. Paratypes: 1♂, 1♀ (CCH), same locality and collector as the holotype, 23. IV –15. V, 2008; 1♂ (CCH), same locality and collector, 28. IV, 2010; 1♀ (CCH), same locality and collector, 1–15. V, 2010; 1♂ (CCH), 29. IV, 2011; 1♂ (CCH), 14. V, 2011; 1♂ (CCH), same locality and collector, 15. V, 2011; 1♀ (CCH), same locality and collector, 11. IV, 2012; 1♀ (CCH), same locality and collector, 17. IV, 2012; 1♀ (CCH), same locality and collector, 24. IV, 2012; 1♂ (CTT), same locality, alt. 2,060 m, IV, 2016, ex stc.; 1♀ (CXG), same locality, IV, 2015, local collector leg.

514 · Zootaxa 4532 (4) © 2018 Magnolia Press YAMASAKO & LIN FIGURES 43–52. Type specimens of Metipocregyes and Hypocacia spp. 43–44, Syntype of Mesosa nodieri Pic, 1933 [= Metipocregyes nodieri (Pic, 1933)]; 45–46, holotype of Metipocregyes affinis Breuning, 1968; 47–48, holotype of Hypocacia fruhstorferi Breuning, 1959 [= Metipocregyes fruhstorferi (Breuning), comb. nov.]; 49–52, holotype of Hypocacia biplagiata Breuning, 1935 (SMF, “Eddakara / Malabar”); 43, 45, 47, 49, dorsal view; 44, 46, 48, 52, labels; 50, lateral view; 51, frontal view.

REVIEW OF THE GENUS METIPOCREGYES Zootaxa 4532 (4) © 2018 Magnolia Press · 515 FIGURES 53–67. Male genitalia of Metipocregyes spp. 53–60, M. nodieri; 61–67, M. affinis; 53, 61, tegmen in dorsal view; 54, 62, ditto in lateral view; 55, 63, paramere in ventral view; 56, 64, median lobe in dorsal view; 57, 65, ditto in lateral view; 58, 66, the apex of median lobe in ventral view; 60, 67, median lobe with endophallus in lateral view. Scale: 1.0 mm. For abbreviations, see text.

Description. Male (n = 3, Figs 21–22, 39): LB = 13.0–14.0, WB = 4.7–5.2. Body black, with suberect black and white hairs on dorsal side, beneath antennomeres, femora, and tibiae. Head mostly clothed with white pubescence, with pair of black striae on frons, which extend to occiput through vertex and widened behind upper eye lobe, and with wide black band on each side behind lower eye lobe. Antenna with white pubescence on part of antennomere I, base of II, and each basal part of III–X except for smooth and glossy area on upper surface of IV–VII (sometimes on IV–X), and the remainders with black pubescence; antennomere III with tuft of black hairs on apical part. Pronotum with same white pubescence as head except for pair of longitudinal wide black vittae on disk, which usually connect each other basally, and with black band on each lateral side. Elytra each mostly clothed with black pubescence, scattered with small spots of white pubescence irregularly concentrated on humerus, behind scutellum along suture, near middle, near apical 1/3, and near apex. Legs with white pubescence on femora and tibiae except for middle and apex of each femur, before middle and apex of each tibia, and claws. Eye deeply emarginate; upper and lower lobes connected posteriorly by 2–4 rows of ommatidia, LL/WL = 1.2–1.3, LL/LG = 1.1–1.4. Antenna about 1.3–1.4 times as long as body length; relative lengths of each antennomere from I to XI as follows: 1.6–1.7 : 0.3 : 1.9–2.0 : 1.3–1.4 : 0.9–1.0 : 0.7–0.8 : 0.7 : 0.6–0.7 : 0.6 : 0.6 : 0.6; antennomeres III and VI slightly dilated inwardly at each apex. Pronotum LP/WP = 0.8, WP/WEH = 0.7, constricted and transversally depressed near base and apex; disk with pair of obtuse indistinct swellings on middle, and sparse umbilicated punctures. Elytra LE/BL = 0.7, LE/WEH = 1.9–2.0, LE/LP = 3.5–3.6, gentry narrowed toward apical 1/4, arcuately narrowed and rounded apically; disk with umbilicated punctures on basal part, which are rough and distinct in basal half but reduced apically, and almost disappeared in apical half. Male genitalia as in Figs 89–95. Tegmen in dorsal view widest near middle, gently curved in lateral view;

516 · Zootaxa 4532 (4) © 2018 Magnolia Press YAMASAKO & LIN paramere in dorsal view thick, ca. 1/5 length of tegmen, gently and arcuately narrowed toward rounded apex, with setae arising from latero-dorsal side and concentrated apically; ringed part in dorsal view gently expanded laterally near middle of tegmen, thence gently narrowed basally. Median lobe in dorsal view relatively slender, gently curved in lateral view; basal strut dehiscent from middle of median lobe; apex of ventral plate roundly pointed. Endophallus relatively short, 2.5 times as long as medial lobe; BPH subequal to half-length of median lobe, with pair of CS; MPH with MT+CT cylindrical in proximal half, well swollen ventrally in distal half, and curved near distal 1/4, with MSp and LSp; PB swollen together with APH in elongate and slender clavate shape, with SSp; APH rudimentary, with ED on distal part; MSp minute, sparsely arranged in proximal 2/3 of MT+CT; LSp distributed in distal 1/3, small, uni-dentate, small except for dorsal area in which the spicules become obviously large; SSp minute, densely covered dominant area of PB. Female (n = 2, Figs 23–24, 40): similar to male, but thicker. LB = 14.6–16.0 mm, WB = 5.8–6.3 mm. Antenna 0.9 times as long as body length; antennomeres IV–VI with smooth and glossy area on upper surface of each base; relative lengths of each antennomere from I to XI as follows: 2.2 : 0.4 : 2.4 : 1.3–1.4 : 0.7–0.8 : 0.6 : 0.5–0.6 : 0.5 : 0.5 : 0.4–0.5 : 0.4. Diagnosis. This new species is very different from congeners by the following features: body elongate; elytra covered with black pubescence, scattered with several spots of whitish pubescence. It is superficially similar to Cacia (Ipocregyes) cephaloides Breuning, 1968 and C. (I.) suturevitta Breuning, 1962 from Laos, but easily distinguished from them by having vertically long lower eye lobe and mesosternal process with ridged lateral margins, instead of transverse lower eye lobe and mesosternal process with a tubercle on the center near apex in Cacia Newman, 1842.

FIGURES 68–81. Male genitalia of Metipocregyes spp. 68–74, M. fruhstorferi comb. nov.; 75–81, M. wenhsini comb. nov., holotype; 68, 75, tegmen in dorsal view; 69, 76, ditto in lateral view; 70, 77, paramere in ventral view; 71, 78, median lobe in dorsal view; 72, 79, ditto in lateral view; 73, 80, the apex of median lobe in ventral view; 74, 81, median lobe with endophallus in lateral view. Scale: 1.0 mm. For abbreviations, see text.

REVIEW OF THE GENUS METIPOCREGYES Zootaxa 4532 (4) © 2018 Magnolia Press · 517 FIGURES 82–88. Male genitalia of Metipocregyes brunneatus sp. nov., holotype. 82, Tegmen in dorsal view; 83, ditto in lateral view; 84, paramere in ventral view; 85, median lobe in dorsal view; 86, ditto in lateral view; 87, the apex of median lobe in ventral view; 88, median lobe with endophal lus in lateral view. Scale: 1.0 mm. For abbreviations, see text.

518 · Zootaxa 4532 (4) © 2018 Magnolia Press YAMASAKO & LIN Distribution. Laos (known only from the type locality, Phou Pan). Etymology. The species name is dedicated to the excellent longicornist, Carolus Holzschuh, who kindly provided precious material for this study.

Metipocregyes variabilis sp. nov. (Figs 25–28, 41–42, 96–102)

Type locality. Diaoluoshan, Lingshui County, Hainan Island, China. Type series. Holotype: ♂ (IZAS, Figs 25–26, 41, 96–102), “ 海南陵水县吊罗山 (Hainan, Lingshui County, Diaoluoshan) / 海拔 (Alt.) 921m / 史洪亮 刘晔 (Hong-Liang Shi & Ye Liu) / 中国科学院动物所 (Institute of Zoology, Chinese Academy of Sciences)”, “N18.72510, / E109.86861 / 2012.IV.17 / 中国科学院动物所 ”, “IOZ(E)1905196”. Paratype: 1♀ (OMNH, Figs 27–28, 42), Laoshan, Dayao-shan, Alt. 800–1,200 m, 24°07’N/ 100°01’E, Guangxi Prov., China, V, 1996, Wako coll. (Native leg.). Description. Male (n = 1, Figs 25–26, 41): LB = 13.8 mm, WB = 5.4 mm. Body black, with suberect black and white hairs on dorsal side, beneath antennomeres, femora, and tibiae. Head with whitish pubescence which partly varies from white to pinkish except for pair of narrow longitudinal black vittae extended from frons via vertex to occiput. Antenna with sparse whitish pubescence beneath antennomere I, with same pubescence on base of II, each basal part of III–X except for smooth and glossy area on upper surface of IV–VII, and the remainders with black pubescence; antennomeres III–IV with tuft of black hairs on each apical half of inner side. Pronotum with same whitish pubescence as head except for pair of narrow longitudinal black vittae on disk and indistinct transverse black band on each lateral side. Elytra irregularly scattered with small spots of same whitish pubescence as head and pronotum throughout, with narrow indistinct zigzag black bands on basal 1/4, behind middle, and near apices. Legs with pro- and mesofemora with whitish pubescence except each apex; metafemur with same pubescence except middle and apex which are covered black pubescence; each tibia annularly with whitish pubescence middle and apex. Eye deeply emarginate; upper and lower lobes connected posteriorly by 2–3 rows of ommatidia, LL/WL = 1.2, LL/LG = 1.2. Antenna 1.3 times as long as body length; relative lengths of each antennomere from I to XI as follows: 1.7 : 0.3 : 2.0 : 1.4 : 1.0 : 0.8 : 0.7 : 0.6 : 0.6 : 0.5 : 0.6; antennomeres III and VI slightly thickened at each apex. Pronotum LP/WP = 0.8, WP/WEH = 0.7, weakly constricted at base, transversally depressed near base and apex, with pair of obtuse indistinct swellings and sparse granules on disk. Elytra LE/BL = 0.7, LE/WEH = 1.8, LE/ LP = 3.5, evenly narrowed from subquadrately projected humeri toward apical 1/5, arcuately narrowed and rounded apically; disk with sparse granules on basal part, irregularly with punctures which are rough and distinct in basal half but reduced apically. Male genitalia as in Figs 96–102. Tegmen in dorsal view widest near middle, gently curved in lateral view; paramere in dorsal view thick, ca. 1/5 length of tegmen, delated laterally at base of ventral side, gently narrowed toward subquadrate apex, with setae arising from latero-dorsal side and concentrated apically; ringed part in dorsal view gently expanded laterally near middle of tegmen, thence gently narrowed basally. Median lobe in dorsal view thick, gently curved in lateral view; basal strut dehiscent before middle of median lobe; apex of ventral plate roundly pointed. Endophallus relatively short, ca. 2.5 times as long as medial lobe; BPH slightly longer than half- length of median lobe, with pair of CS; MPH with MT+CT cylindrical in proximal half, well swollen ventrally in distal half, and curved near distal 1/4, with MSp and LSp; PB swollen together with APH in elongate and slender clavate shape, with SSp; APH rudimentary, with ED on distal part; MSp minute, sparsely arranged in proximal 2/3 of MT+CT; LSp distributed in distal half of MT+CT, unidentate, small except for dorsal area in which the spicules become obviously large; SSp minute, densely covered dominant area of PB. Female (n = 1, Figs. 27–28, 42): LB = 15.6 mm, WB = 6.1 mm. Similar to male, but body somewhat thicker. Antenna 0.9 times as long as body length, with tuft of black hairs only on antennomere III; antennomeres IV–VI with smooth and glossy area on upper surface of each base; relative lengths of each antennomere from I to XI as follows: 2.3 : 0.4 : 2.3 : 1.4 : 0.7 : 0.6 : 0.6 : 0.4 : 0.4 : 0.4 : 0.4. Diagnosis. This species is similar to M. holzschuhi sp. nov., but is distinguished from the latter by: body with partly pinkish pubescence; pronotum with pair of longitudinal black vittae which are hardly connected each other; elytra irregularly with whitish and pinkish pubescence throughout.

REVIEW OF THE GENUS METIPOCREGYES Zootaxa 4532 (4) © 2018 Magnolia Press · 519 Distribution. China (Guangxi, Hainan). Etymology. The species name reflects its variable color of pubescence on the body surface.

FIGURES 89–102. Male genitalia of Metipocregyes spp. 89–95, M. holzschuhi sp. nov., holotype; 96–102, M. variabilis sp., holotype; 89, 96, tegmen in dorsal view; 90, 97, ditto in lateral view; 91, 98, paramere in ventral view; 92, 99, median lobe in dorsal view; 93, 100, ditto in lateral view; 94, 101, the apex of median lobe in ventral view; 95, 102, median lobe with endophallus in lateral view. Scale: 1.0 mm. For abbreviations, see text.

Key to the species of Metipocregyes

1. Antennae without tuft of hairs...... 2 - Antennae with tufts of hairs on antennomeres III and/or IV...... 4 2. Eye lobes subdivided, connected posteriorly by line with or without row of ommatidia; elytra with black and whitish pubes- cence...... 3 - Eye lobes deeply emarginate, connected posteriorly by 2–4 rows of ommatidia; elytra with brown, black and white pubes- cence. (S. Vietnam) ...... Metipocregyes brunneatus sp. nov. 3. Elytra with small spots of whitish and/or yellowish pubescence which are concentrated and form large vague maculae near apex. (SE. China, N. Vietnam) ...... Metipocregyes nodieri (Pic) – Elytra scattered with small spots of whitish pubescence throughout, without large maculae. (N. Laos, N. Thailand) ...... Metipocregyes affinis (Breuning) 4. Body with black and brownish or yellowish pubescence; antennomere IV–VI normal, without distinct smooth and glossy area, covered with pubescence as well as the succeeding antennomeres; pronotum without distinct black vittae on disk; endophallus with PB and APH pyriform...... 5 - Body with black and whitish or pinkish pubescence; antennomeres IV–VI with distinctly smooth and glossy area on upper sur- face of each base; pronotum with black vittae on disk; endophallus with PB and APH slender...... 6 5. Antennae with tuft of black hairs only on antennomere IV, without tuft on III; pronotum irregularly with brown pubescence; elytra with indistinct brown maculae near middle and apex. (N. Laos, N. Vietnam) ...... Metipocregyes fruhstorferi (Breuning), comb. nov.

520 · Zootaxa 4532 (4) © 2018 Magnolia Press YAMASAKO & LIN - Antennae with tufts of black hairs on antennomeres III and IV, but the one on IV sometimes indistinct; pronotum and elytra irregularly with black and yellowish pubescence of which yellowish ones form indistinct maculae near middle and apex. (Tai- wan) ...... Metipocregyes wenhsini (Yamasako & Chou), comb. nov. 6. Body with black and white pubescence, without pinkish pubescence; antennomere III with tuft of black hairs, but without dis- tinct tuft on IV in both sexes; pronotum with pair of longitudinal black vittae which are connected each other basally; elytra with small spots of white pubescence which are irregularly concentrated on humeri, behind scutellum along suture, near mid- dle, near apical 1/3, and near apices. (N. Laos) ...... Metipocregyes holzschuhi sp. nov. - Body with black, whitish and partly pinkish pubescence; antennomeres III and IV with tufts of black hairs in male, but only III in female; pronotum with pair of longitudinal black vittae which are hardly connected each other; elytra irregularly with whit- ish pubescence throughout, which are partly varying to pinkish pubescence. (Guangxi, Hainan)...... Metipocregyes variabilis sp. nov.

Conclusion

The genus Metipocregyes is reviewed and recomposed of seven species (including new combinations and new species) in the present paper. The members of the genus could be subdivided into the following four species groups in a very strict sense. Of those groups, only the nodieri group fits well the previous definition of the genus originally proposed for a single species, M. nodieri, by Breuning (1939). Meanwhile the other three species groups mostly agree with the original concept and share the basic external and male genital features defined above; thus, we conclude that they are congeneric. Furthermore, the nodieri and the brunneatus groups have a very close relationship with each other by sharing most of the external and male genital features, and the fruhstorferi group, due to its intermediate characteristics of body shape, presence of antennal tufts, shape of the endophallus, etc., resides between the former two and the remaining species group. We conclude that these intermediate forms and continuous characters support the inclusion of all these species groups into a single genus. The genus is therefore redefined in a broad sense for seven species in the present study.

1. The nodieri group: This species group is the nominotypical species group of the genus and is composed of M. nodieri and M. affinis. It is recognized by the following features: body relatively small; eyes almost subdivided; antenna without distinct tuft of hairs; pronotum without distinct vittae; elytra relatively short; endophallus relatively long, curved but hardly swollen ventrally; APH roundly swollen with PB, with or without undeveloped AA. 2. The brunneatus group: This species group is comprised of only one species, M. brunneatus sp. nov. It is very similar to and shares many of the external and male genital features with the nodieri group, but differs from the latter by having deeply emarginated eye with large lower lobe and elongate elytra. 3. The fruhstorferi group: This species group comprises two species, M. fruhstorferi comb. nov. and M. wenhsini comb. nov.. It is characterized by the following features: body relatively large; antenna with tufts of hairs on antennomeres III and/or IV; pronotum without distinct vittae; elytra elongate or somewhat thick; endophallus relatively long, curved and weakly swollen ventrally near distal 1/4 of MT+CT; APH swollen together with PB in pyriform shape; LSp more or less becoming larger in dorsal side. 4. The holzschuhi group: This species group includes M. holzschuhi sp. nov. and M. variabilis sp. nov. Characters include: body relatively large; lower eye lobe relatively large; antenna with distinct tufts of hairs on antennomeres III and sometimes on IV; pronotum with pair of distinct black vittae on disk; elytra elongate; endophallus short, curved and well swollen ventrally near distal 1/4 of MT+CT; APH swollen together with PB in elongate slender clavate shape LSp becoming larger in dorsal side.

Metipocregyes may have a close relationship to Japanomesosa Yamasako & Ohbayashi, 2007 and Mesosaimia Breuning, 1938 because of the following shared external and male genital characteristics: lower eye lobe longer than wide; antennal tubercle elevated; mesosternal process with ridged lateral margins; tegmen wide, with somewhat thick parameres; endophallus with LSp relatively small and unidentate; and APH usually rudimentary. A combination of these characteristics is almost unique within Mesosini and very different from the major genera of the tribe such as Agelasta Newman, 1842; Cacia Newman, 1842; Coptops Audinet-Serville, 1835; Mesosa Latreille, 1829; among others.

REVIEW OF THE GENUS METIPOCREGYES Zootaxa 4532 (4) © 2018 Magnolia Press · 521 Acknowledgements

We wish to express our thanks to Andrea Hastenpflug-Vesmanis (SMF), Shepherd Myers (previously BPBM), Azadeh Taghavian (MNHN), Gérard Luc Tavakilian (Paris, France), Yaheita Yokoi (Ratingen, Germany), Joachim Willers (MNHUB), for various help in examining the type material used in the present study, also to Xavier Gouverneur (Rennes, France), Michiaki Hasegawa (Toyohashi Museum of Natural History, Toyohashi, Japan), Carolus Holzschuh (Villach, Austria), Takashi Kurihara (Tochigi Prefectural Museum, Utsunomiya, Japan), Bin Liu (BITS), Hiroshi Makihara (Isumi, Japan), Charyn Micheli (NMNH), Tatsuya Niisato (Bioindicator Co., Ltd., Tokyo, Japan), Shigehiko Shiyake (OMNH), Tomáš Tichý (Ostrava, Czech Republic), Shigeo Tsuyuki (Zushi, Japan), Hiroyuki Yoshitomi (EUMJ) for offering invaluable specimens. Thanks are also due to Steven Lingafelter (Arizona, USA) and Nobuo Ohbayashi (Miura, Japan) for reviewing the original draft of this paper, and Carolus Holzschuh for providing useful comments about the habitus of Metipocregyes species from Laos. We thank the editorial staff of Zootaxa and Eugenio Nearns (USDA APHIS, Washington, DC, USA) for reviewing and processing this contribution. This project was supported by NSFC programs 31472029 and J1210002 and partly by a grant (No. Y229YX5105) from the Key Laboratory of the Zoological Systematics and Evolution of the Chinese Academy of Sciences.

References

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