______Mun. Ent. Zool. Vol. 15, No. 2, June 2020______ISSN 1306-3022 301 TAXONOMIC NOTES ON THE WATERHOUSE, 1867 (COLEOPTERA, SCARABAEOIDEA, ) (PART 2) WITH DESCRIPTION OF NINE NEW SPECIES AND A NEW SUBSPECIES

Guido Sabatinelli*

* Muséum d’histoire naturelle, Case Postale 6434, CH-1211 Genève 6, SWITZERLAND. E- mail: [email protected]

[Sabatinelli, G. 2020. Taxonomic notes on the genus Cyphochilus Waterhouse, 1867 (Coleoptera, Scarabaeoidea, Melolonthinae) (part 2) with description of nine new species and a new subspecies. Munis Entomology & Zoology, 15 (2): 301-318]

ABSTRACT: This work presents the description of 10 taxa of Cyphochilus Waterhouse, 1867 from Indochina: C. champasakensis sp. nov. from Laos, C. hongbangensis sp. nov. from Vietnam, C. lanxangensis sp. nov. from Laos (and Myanmar ?), C. latus aisiqi ssp. nov. from Yunnan, C. mogokensis sp. nov. from Myanmar, C. nguoithuong sp. nov. from Vietnam, C. toungooensis sp. nov. from Thailand and Myanmar, C. usuparatch sp. nov. from Thailand, C. vanlangensis sp. nov. from Vietnam and C. wattanapanit sp. nov. from Thailand. Habitus and parameres, in three projections, of the taxa treated are illustrated. Lectotype are designated for C. latus Arrow 1941. A checklist with distribution of the resulting 46 Cyphochilus valid species is provided.

KEY WORDS: Systematics, , Yunnan, Thailand, Laos, Vietnam

The improved political and social situation in the Southeast Asia greatly contributed to improve the knowledge of its fauna and to focus on conservation problems and on the development of national scientific Institutions. Several collaborative programs have been established with foreign Institutions and scientists for the systematic sampling of the northern areas of Vietnam, Laos, and Myanmar. This has resulted in a large number of specimens, including Melolonthine , becoming available for study in museums and private collections. The genus Cyphochilus Waterhouse, 1867 is in need of a revision to accommodate new species and for a comprehensive assessment of the phylogenetic relationships of the taxa. To that end, I recently published (Sabatinelli, 2020) a first note with a revision of a “Section” of the genus defined by Waterhouse (1867) as “the species having the mesosternum armed by a spur”. This second note presents the results of the study of several Cyphochilus collected in the recent years from Indochina among which 10 new taxa were identified: I am still treating the species according to Waterhouse (1867) in “Sections” although this term does not have any phylogenetic meaning but only practical. Two more notes and a final revision of the genus are planned to be published in the years 2020-21.

MATERIAL AND METHODS

Specimens: Material for this study was borrowed from, or deposited in the institutions listed below with codens as given in Evenhuis (2007): ABPC – Ales Bezděk private collection, Branisovska, Czech Republic.

______Mun. Ent. Zool. Vol. 15, No. 2, June 2020______302 ISSN 1306-3022 ARPC – Andreas Reichenbach private collection, Leipzig, Germany. BMNH – Natural History Museum, London, Great Britain. MHNG – Muséum d'Histoire Naturelle, Geneva, Switzerland. MNPC – Milan Nikodým private collection, Prague, Czech Republic. MZUF – Museo Zoologico "La Specola", Florence, Italy. NHMB – Naturhistorisches Museum, Basel, Switzerland. NMW – Naturhistorisches Museum Wien, Wien, Austria. VNMN – Vietnam National Museum of Nature di Hanoi, Vietnam.

All specimens in the collection of the author were donated to the MHNG and integrated in the general collection, but their origin is given on the labels. The institution holding the type specimens is given at the begin of the text in the sections "Material examined", followed by the label information. Labels of the type specimens are cited verbatim and the used signs indicate: // separates data on different labels; if not indicated otherwise, they are on rectangular white labels; / line separation on same label; [...] square brackets contain comments of the author relating to verbatim data; [sic] indicates a mistake in the original data label; (H) indicates handwritten; (P) indicates printed. All other specimen information follows the standards of the journal, with specimen lots separated by the character combination "// – "

Descriptions: Descriptions are based on external morphology and characters of the male genitalia. Due the relative uniformity of the general morphology of Cyphochilus in contrast with the extreme diversification of the parameres, only the characters useful for the identification and for the differential diagnosis are considered. The common characters for the species of Cyphochilus are listed in Sabatinelli (2020), where also a discussion on the relate genera is provided. Morphological terminology follows Torre-Bueno et al. (1989). Male genitalia: Aedeagi were dissected and cleaned manually without any chemical treatment to avoid any distortion, then glued to a cardboard pinned under each specimen from which they were removed. Images and measurements: A Leica DFC425 camera in conjunction with a Leica M205- C stereo microscope was used to produce source images, which were subsequently stacked using the software Zerene Stacker, and adjusted and grouped in plates using Adobe Photoshop.

Abbreviations: Characters, measurements, mensural procedures, and ratios are as follows: BL : Body length, measured from anterior margin of clypeus to apex of elytra, in dorsal view. BW : Body width, measured across the elytral humeri, in dorsal view. BWX : Greatest body width, measured across the elytral maximal width, in dorsal view. CW/L : Clypeal ratio, derived from width measured along clypeo-frontal suture divided by greatest length of clypeus. F/O : Interocular ratio, derived from minimum frons width across eyes divided by transverse compound eye diameter in dorsal view. A2-7L/CL : Antennal ratio, derived from length of basal segments 2-7 divided by antennal club length. PnW/L : Pronotal ratio, derived from pronotal greatest width divided pronotal length along midline, in dorsal view. MstL : Mesosternal process length, in lateral view.

______Mun. Ent. Zool. Vol. 15, No. 2, June 2020______ISSN 1306-3022 303 RESULTS

SECTION 1 This group created by Waterhouse (1867) includes species with elytra smooth without elevated striae mesosternum armed with a short spur, length in lateral view 0.2-0.6 mm (Fig. 17). This group up to now accommodates the following 12 species: Cyphochilus carinchebanus Brenske, 1903, C. feae Brenske, 1903, C. obscurus Sharp, 1876, C. peninsularis Arrow, 1938, C. proximus Sharp, 1876, C. tricolor Waterhouse, 1867, C. hmong Sabatinelli, 2020, C. leducthoi Sabatinelli, 2020, C. orbachi Sabatinelli, 2020, C. reichenbachi Sabatinelli, 2020, C. rohingyae Sabatinelli, 2020, C. zuercheri Sabatinelli, 2020, and the species here below described.

Cyphochilus wattanapanit sp. nov. (Figs. 1-3, 34) Holotype: THAILAND: MHNG 1 ♂ // North Thailand / Chiang Mai, Chiang Dao / V.1984 (P) // HOLOTYPUS ♂ / Cyphochilus / wattanapanit mihi / G. Sabatinelli, 2020 (P on red) //.

Description of the Holotype male: Size – BL: 19.4 mm, BW: 8.4 mm, BWX: 10.5 mm, situated at midpoint of elytra. Color – Integument light brown; surface with yellowish scales aggregated along the sides of pronotum and margins of elytra where they are withe. Head – CW/L: 3.7; anterior margin of clypeus rounded, lateral margins convex and divergent posteriad; frons large, making eyes relatively small (F/O: 4.3); frons concave; antennal club longer than antennomeres 2-7 (A2-7/CL: 0.45). Pronotum – Transverse (PnW/L: 2), strongly convex, apical angles right, not protuberant; basal lateral margins straight, basal angles largely obtuse. Elytra – Smooth, without any elevated striae. Thoracic sterna – Surface with short, white pubescence and scales, mesosternum developed anteriorly (MstL: 0.90 mm). Abdomen – Sternites with scattered scales; pygidium convex with apical margin narrowly reflected. Legs – Protibiae bidentate; slender apical tooth longer than the middle tooth. Aedeagus – Parameres asymmetric, left paramere with two apophysis, right paramere with one only, all apophysis curved dorsally as in figures 1-3. Females: Unknown. Etymology: The noun in apposition refers to Rodjaraeg Wattanapanit the first Thai woman, human rights activist, who was the recipient of the 2016 International Women of Courage Award; she co-founded the nonprofit organization Creating Awareness for Enhanced Democracy (CAFÉ), which encourages the unfettered exchange of thoughts. Type locality: Chiang Dao is a town and sub-district (tambon) of Chiang Dao District, in Chiang Mai Province, Thailand, 87 km North of Chiang Mai. Remarks: Cyphochilus wattanapanit sp. nov. can be readily separated from all other congeners and in particular, from the eleven species of Section 1 above mentioned by the unique form of the parameres the left with two appendices, the right with one, all curved dorsally.

SECTION 2 This group includes species with mesosternum unarmed and elytra with five elevated striae, the fourth stria in some species may be less elevated than the other. This group accommodates most of Cyphochilus described species plus those new here below.

______Mun. Ent. Zool. Vol. 15, No. 2, June 2020______304 ISSN 1306-3022 Cyphochilus champasakensis sp. nov. (Figs. 4-6, 35) Holotype: LAOS: MHNG 1 ♂ // NE Laos – 1500 m / Xing Khan [most probably Xieng Khouang], 20.V.1966 // HOLOTYPUS ♂ / Cyphochilus / champasakensis mihi / G. Sabatinelli, 2020 (P on red) //. Paratypes (27 specimens): MHNG 12 ♂♂, 11 ♀♀; same data than the Holotype – NMW 1 ♂ // NE Laos, Houphanh pr. / Ban Saluei, alt. 1500m / 30km S of Xam-Neua / 103˚59’33”E 20˚13’39”N / 6-17.5.2004 P. Kresl lgt // – MHNG 1 ♀; MNPC 1 ♂ (P) // NE Laos – Hua Phan Prov. / Ban Saluey, Phu Phan Mt / 20˚15’N 104˚02’E, 1500-2000m / 26.IV-11.V.2011, leg D.Hauck (P) // – NHMB 1 ♂ // Laos-NE, Hua Phan prov. / ~20˚12’N 104˚01’E, / PHU PHAN Mt, 1500- / 1900m, 17.v-3.vi.2007 / M. Brancucci leg. (P) //. All above specimens labeled as // PARATYPUS ♂ or ♀ / Cyphochilus / champasakensis mihi / G. Sabatinelli, 2020 (T on red) //.

Description of the Holotype male: Size – BL: 20.6 mm, BW: 8,2 mm, BWX: 11 mm, situated at midpoint of elytra. Color – Integument shiny black except legs and appendices light brown; dorsal surface with white-greenish almost iridescent scales, yellow scales densely aggregated along the sides of pronotum and margins of elytra. Head – CW/L: 2.7; anterolateral margin of clypeus largely rounded; frons large, making eyes relatively small (F/O: 5.4); antennal club much longer than antennomeres 2-7 (A2-7/CL: 0.5). Pronotum – Transverse (PnW/L: 2.1), strongly convex; apical angles right and basal angles obtuse. Elytra – With five elevated striae, the fourth less elevated than the other. Thoracic sterna – Surface with brown pubescence and very few scales; mesosternum not developed anteriorly. Abdomen – Sternites with sparse scales, absent in the median part of the sternites; pygidium convex with apical margin not reflected, ventrally enlarged. Legs – Protibia tridentate with the basal tooth more distant than the two subequal apical tooth. Aedeagus – Parameres curved dorsally, medial lobe ending with two apophysis curved dorsally, the right one smaller than the left as in figures 4-6. Variability: BL: 19.5-24 mm (x = 20.8, n = 25); no major differences from the morphology of the holotypus. Females: BL: 23.4-24 mm; BW: 9.9-10; BWX: 13.2-13.4; antennal club ovate, shorter than preceding antennomeres (A2-7/CL: 1.1); pygidium not enlarged ventrally. Etymology: Champasak was a Lao kingdom (1713–1904) under Nokasad. Champasak and the neighboring principalities emerged as power centers under what was later described as the Mandala Southeast Asian political model. Type locality: Xieng Khouang is a province of Laos, located in the Xiangkhouang Plateau, northeast of the country. Originally, known as the Principality of Muang Phuan (Muang Phouan / Xieng Khouang), the present capital of the province is Phonsavan. Xiangkhouang Province has largely a mountainous topography. The province borders Luang Prabang Province to the northwest, Houaphan Province to the northeast, Vietnam to the east, Bolikhamsai Province to the southeast, and Vientiane Province to the southwest. Distribution: A part from the typical locality the species is known also from the Hua Phan province also in northeast of Laos. Remarks: Cyphochilus champasakensis sp. nov. for the greenish iridescent scales, the ovoid shape of the body is morphologically close to C. latus Arrow and C. usuparatch sp. nov.; it can be readily separated from them by the unique form of the parameres (Figs. 4-6 vs. 10-12 and 24-26).

______Mun. Ent. Zool. Vol. 15, No. 2, June 2020______ISSN 1306-3022 305 Cyphochilus hongbangensis sp. nov. (Figs. 7-9, 36) Holotype: VIETNAM: MHNG 1 ♂ // N. Vietnam, Tam Dao / 18 VI 2918 400-900n / leg. Hoa Binh Nguyen (P, on yellow) // HOLOTYPUS ♂ / Cyphochilus / hongbangensis mihi / G. Sabatinelli, 2020 (P on red) //.

Description of the Holotype male: Size – BL: 20.64 mm, BW: 8.4 mm, BWX: 10.8 mm, situated at midpoint of elytra. Color – Integument dark shiny brown; dorsal surface with white scales narrowly aggregated along the margins of elytra. Head – CW/L: 3.1; anterolateral edges of clypeus largely rounded; frons large, making eyes relatively small (F/O: 3.5); antennal club, longer than antennomeres 2-7 (A2-7/CL: 0.6). Pronotum – Transverse (PnW/L: 2.3), convex; apical angles right, basal angles largely rounded. Elytra – With five slightly elevated striae. Thoracic sterna – Surface with short, yellow pubescence and scattered scales; mesosternum slightly developed not visible between the mesocoxae in lateral view. Abdomen – Sternites with sparse scales less dense along the median part; pygidium convex with apical margin narrowly reflected. Legs – Protibia tridentate with apical tooth as long as the middle tooth. Aedeagus – Parameres asymmetric both with two apophysis curved dorsally, median lobe developed in form of a long straight point as in figures 7-9. Females: Unknown. Etymology: The Hong Bang period was a legendary, semi mythical period in Vietnamese history spanning from the political union in 2879 BC of many tribes of the northern Red River Valley to the conquest by An Duong Vuong in 258 BC. Type locality: Tam Dao is the capital of a rural district (huyện) of Vĩnh Phúc Province (meaning "everlasting fortune") in the Red River Delta region of northern Vietnam. Remarks: Cyphochilus hongbangensis sp. nov. can be readily separated from all other congeners by the unique form of the parameres in which the right one develops an extraordinary dorsal process (Figs. 8-9). We are grateful to Prof. Andreas Reichenbach who donated his unique specimen and Holotype to the MHNG.

Cyphochilus latus aisiqi ssp. nov. (Figs. 13-15, 37) Holotype: CHINA, YUNNAN: MHNG 1 ♂// W. Yunnan prov. / Mts 60 km E Tengchong / 2300m, 14-19.V.2006 / S. Murzin & I. Shokhin leg. (P) // HOLOTYPUS ♂ / Cyphochilus / latus ssp. aisiqi mihi / G. Sabatinelli, 2020 (P on red) //. Paratypes (5 specimens): MHNG 4 ♂♂ and 1 ♀; same data than the Holotype. All specimens labeled as // PARATYPUS ♂ or ♀ / Cyphochilus / latus ssp. aisiqi mihi / G. Sabatinelli, 2020 (P on red) //. Other type material examined (4 specimens): Cyphochilus latus Arrow 1941; Lectotype, by present designation: BMNH 1 ♂; MYANMAR // Cyphochilus / latus Arrow / co-type // India or. (M) // Co-Type (P on round label with yellow border) // N. E. Burma / R Malaise / B.M. 1945-71 (P) // N. E. Burma / Kambaiti 7000 ft. / 18.4.1934 / R. Malaise (P&H) // (Figs. 10-12). – Paralectotype, by present designation: BMNH; 3 ♀♀; same data than the Lectotype.

Description of the Holotype male: Size – BL: 20 mm, BW: 9 mm, BWX: 11.5 mm, situated at midpoint of elytra. Color –Integument shiny black, legs and appendices light brow; dorsal surface with white greenish scales more densely aggregated along the sides of pronotum and margins of elytra. Head – CW/L: 3.1; anterolateral edges and sides of the clypeus largely rounded; frons large, making

______Mun. Ent. Zool. Vol. 15, No. 2, June 2020______306 ISSN 1306-3022 eyes relatively small (F/O: 6.4); antennal club longer than antennomeres 2-7 (A2- 7/CL: 0.5). Pronotum – Transverse (PnW/L: 2.3), strongly convex; apical angles right, basal angles obtuse. Elytra – With five elevated striae the forth less elevated than the other. Thoracic sterna – Surface with yellow pubescence and very small and scattered white scales; mesosternum not developed anteriorly. Abdomen – Sternites with very scattered small scales; pygidium slightly convex with apical margin not reflected. Legs – Protibia tridentate with the basal tooth vestigial; slender apical tooth as long as the middle tooth and closer than the basal. Aedeagus – Both parameres with an external apophysis, median lobe with two apophysis, the left more developed and curved dorsally, the right one small, thin and straight as in figures 13-15. Variability: BL: 19.5-20.5 mm; no major differences from the morphology of the holotypus. Females: BL: 22.7 mm; BW: 9.5; BWX: 12.6; antennal club ovate, shorter than preceding antennomeres (A2-7/CL: 1.4). Etymology: The noun in apposition refers to Ai Siqi the pen name of Li Shengxuan (1910–1966), a Yunnan Mongol Chinese philosopher author of important works on Materialism and Philosophy for the Masses, born in Tengchong in Yunnan, where the Holotype specimen of the new subspecies was collected. Type locality: Tengchong (pinyin: Téngchōng) 25°01′N 98°29′E is a county- level city of Baoshan City, western Yunnan province, People's Republic of China. It borders with Myanmar in the northwest for 150 km. Remarks: Cyphochilus latus aisiqi ssp. nov. can be readily separated from the nominal subspecies for the minor development of the apophysis of the medial lobe of the parameres (Figs. 14-15 vs. 11-12). Considering the differences are not in the structure of paramera but only in the development an apophysis, I prefer, for the time being, to consider this taxon as subspecies of C. latus.

Cyphochilus mogokensis sp. nov. (Figs. 16-18, 38) Holotype: MYANMAR: BMNH 1 ♂ // Birmah / Ruby Mes [Mines] // Fry Coll. / 1905-100 (P)// Cyphochilus / Arrowi Ley. / 1923 Type (H) // Type (P on round label with red border) // HOLOTYPUS ♂ / Cyphochilus / mogokensis mihi / G. Sabatinelli, 2020 (P on red) //.

Description of the Holotype male: Size – BL: 17.5 mm, BW: 6.9 mm, BWX: 8.6 mm, situated at third distal of elytra. Color – Integument shiny reddish- brown, antennae, legs and appendices yellowish; dorsal surface with yellowish scales uniformly distributed. Head – CW/L: 4.1; anterolateral edges of clypeus largely rounded posteriad up to eyes; frons large, making eyes relatively small (F/O: 4.9); antennal club much longer than antennomeres 2-7 (A2-7/CL: 0.4) and curved externally. Pronotum – Transverse (PnW/L: 1.8), convex; apical angle right and basal obtuse. Elytra – With five equally elevated striae. Thoracic sterna – Surface with yellow pubescence and sparse scales; mesosternum not developed. Abdomen – Sternites with sparse scales excepting the median part of the eight sternite, which is also convex; pygidium slightly convex with apical margin not reflected. Legs – Protibia tridentate; slender apical tooth as long as the middle tooth. Aedeagus – Parameres asymmetric with four appendices as in figures 16- 18. Females: Unknown.

______Mun. Ent. Zool. Vol. 15, No. 2, June 2020______ISSN 1306-3022 307 Etymology: Mogok was in Shan State during the British rule of Myanmar and presently in the Mandalay Region. Mogok and other villages nearby have been famous since ancient times for its gemstones, especially ruby and sapphire. Type locality: Ruby Mines is an historical but generic locality in Myanmar some 200km northeast of Mandalay 148 km northeast of Shwebo in the Pyin Oo Lwin District. Remarks: Cyphochilus mogokensis sp. nov. for the antenna curved externally seems related to C. oberthueri Brenske, 1903 from Tamil Nadu (India) however, the aedeagus of the two species has a different structure. C. mogokensis sp. nov. can be readily separated from all other congeners by the unique form of the parameres. Ley in 1923 labeled this specimens as type of C. arrowi, however never described.

Cyphochilus nguoithuong sp. nov. (Figs. 19-20, 39) Holotype: VIETNAM: VNMN 1 ♂ // C. [Central] Vietnam: Kon Tum prov. / Kon Plong distr., surroundings / of Mang Den, 1120 m / 14°37,350’ N 108°17,651 E (P) // leg. L. Bartolozzi, S. Bambi / A. Bandinelli, V. Sbordoni – at / light 4-7.V.2016 (Mag. 3078) (P) // HOLOTYPUS ♂ / Cyphochilus / nguoithuong mihi / G. Sabatinelli, 2020 (P on red) //. Paratypes: (3 specimens): MZUF (coll. #20193) 2 ♂♂, MHNG 1 ♂; same collection data than the Holotype. All specimens labeled as // PARATYPUS ♂ / Cyphochilus / nguoithuong mihi / G. Sabatinelli, 2020 (P on red) //.

Description of the Holotype male: Size – BL: 23.5 mm, BW: 9.6 mm, BWX: 12.5 mm, situated at midpoint of elytra. Color –Integument dark shiny brown; dorsal surface with white scales densely aggregated along the margins of elytra. Head – CW/L: 2.9; anterolateral edges of clypeus rounded; frons large, making eyes relatively small (F/O: 4.3); antennal club, longer than antennomeres 2-7 (A2- 7/CL: 0.6). Pronotum – Transverse (PnW/L: 2), strongly convex, apical angles right and basal angles obtuse. Elytra – With five equally elevated striae. Thoracic sterna – Surface with long, white pubescence and scales; mesosternum not developed anteriorly, mesocoxae contiguous. Abdomen – Sternites with scales sparse along the median part; pygidium slightly convex with apical margin not reflected. Legs – Protibia tridentate with the basal tooth smaller; apical tooth as long as the middle tooth. Aedeagus – Parameres very long, almost symmetrical, narrowed at the apex as in figures. 19-20. Variability: BL: 22.9-23.5 mm; no major differences from the morphology of the holotypus. Females: Unknown. Etymology: The noun in apposition refers to Nguoi Thuong which in Vietnamese indicates an highlander indigenous population inhabiting the Central Highlands and nearby areas. Type locality: Mang Deng is situate in the Kon Tum Province, which lies in the Central Highlands region of Vietnam and shares borders with Laos and Cambodia. The province is primarily located in the Sê San river basin, though parts are also in the headwaters of the Vu Gia, Trà Khúc and Sekong Rivers. Remarks: Cyphochilus nguoithuong sp. nov. can be readily separated from all other congeners by the unique form of the parameres, which are almost symmetrical, very long and narrowed at apex.

______Mun. Ent. Zool. Vol. 15, No. 2, June 2020______308 ISSN 1306-3022 Cyphochilus toungooensis sp. nov. (Figs. 21-23, 40) Holotype: THAILAND: MHNG 1 ♂; // Thailand, Chiang Mai prov. / Ang Khang region, 1600±100 m / 19˚53’45’’N 99˚02’45’’E / L. Dembicky leg., 2-7.V.2009. (P) // HOLOTYPUS ♂ / Cyphochilus / toungooensis mihi / G. Sabatinelli, 2020 (P on red) //. Paratypes (3 specimens): NHMG 1 ♂, 1 ♀; // North Thailand / near Chiang Mai, 1994 (P) // – MYANMAR: BMNH 1 ♂ // Kolaw, S. Shan States / 400 ft, Apr. 1916 / F. M. Mackwood / 1916-205 (P) // Cyphochilus / viridescens Ley / det. R. Ley. 1923 (H) // Type (P on round label with red border) // – All above specimens labeled as // PARATYPUS ♂ or ♀ / Cyphochilus / toungooensis mihi / G. Sabatinelli, 2020 (P on red) //.

Description of the Holotype male: Size – BL: 23.8 mm, BW: 9.7 mm, BWX: 12.6 mm, situated at midpoint of elytra. Color –Integument dark shiny black; dorsal surface with withe-greenish scales densely aggregated along the sides of pronotum and margins of elytra. Head – CW/L: 3.1; anterolateral edges of clypeus gently rounded up to canthus; frons large, making eyes relatively small (F/O: 4.6); antennal club, longer than antennomeres 2-7 (A2-7/CL: 0.5). Pronotum – Transverse (PnW/L: 2), strongly convex; apical angles right, basal angles rounded. Elytra – With five elevated striae, the fourth less elevated than the other. Thoracic sterna – Surface with, white pubescence and scales; mesosternum without punctures and hairs, shining, not developed anteriorly between mesocoxae. Abdomen – Sternites with sparse scales; pygidium slightly convex with apical margin not reflected. Legs – Protibia tridentate; slender apical tooth as long as the middle tooth and close to it. Aedeagus – Parameres asymmetric with terminal part of reflected dorsally in two narrow apex, right paramere, dorsally, with a narrow apophysis as in figures 21-23. Variability: BL: 22-24 mm; no major differences from the morphology of the holotypus. Females: BL: 24 mm; BW: 10; BWX: 13.9; antennal club ovate, shorter than preceding antennomeres (A2-7/CL: 1.1). Etymology: The Toungoo dynasty was the ruling dynasty of Burma (Myanmar) from the mid-16th century to 1752; at its peak, Toungoo exercised suzerainty from Manipur to the Cambodian marches and from the borders of Arakan to Yunnan and was probably the largest empire in the history of Southeast Asia. Type locality: Doi Ang Khang is a mountain (1,928 meters a.s.l.) in Fang District, Chiang Mai Province, Thailand. It is part of the Daen Lao Range that straddles both sides of the Burmese-Thai border. Distribution. The species is knowns from two localities across the border between the Chiang Mai Province of northern Thailand and the Shan State of southeastern Myanmar. Remarks: Cyphochilus toungooensis sp. nov. can be readily separated from all other congeners by the unique form of the parameres, which are ending with a dorsally curbed filament. Ley in 1923 labeled one of studied specimens as type of C. viridescens, however never described.

Cyphochilus usuparatch sp. nov. (Figs. 24-26, 41) Holotype: THAILAND: MHNG 1 ♂ // Thailand / Changwat [province in Thai] Nan / 30 km E of Pua / 1700 m /20.II.1998 / leg. Márton Hreblay & Csaba Szabóky (P) // HOLOTYPUS ♂ / Cyphochilus / usuparatch mihi / G. Sabatinelli, 2020 (P on red) //.

Description of the Holotype male: Size – BL: 21.5 mm, BW: 9.3 mm, BWX: 12.5 mm, situated at third distal of elytra. Color – Integument black shiny; dorsal

______Mun. Ent. Zool. Vol. 15, No. 2, June 2020______ISSN 1306-3022 309 surface with white-greenish scales densely aggregated along the sides of pronotum and margins of elytra where are yellowish. Head – CW/L: 3.4; anterolateral margin of clypeus largely rounded; frons large, making eyes relatively small (F/O: 5.1); antennal club, longer than antennomeres 2-7 (A2- 7/CL: 0.5). Pronotum – Transverse (PnW/L: 2.1), strongly convex; apical angles right, basal angles obtuse. Elytra – With five elevated striae the fourth less elevate than the other. Thoracic sterna – Surface with brown pubescence and very few scales; mesosternum not developed anteriorly. Abdomen – Sternites with sparse scales uniformly distributed; pygidium convex with apical margin not reflected. Legs – Protibia tridentate with the basal tooth well developed and more distant from the two apical subequal tooth. Aedeagus – Parameres curved dorsally, medial lobe ending with two long apophysis curved dorsally, the right one as long as the left one and straight as in figures 24-26. Females: unknow. Etymology: The noun in apposition refer to the bull Usuparatch carrying the stupa of Phrathat Chae Haeng, the provincial seal of Nan Province where Pua District is located. Type locality: Nan is a province (changwat) in northern Thailand. Neighboring provinces are (from South clockwise): Uttaradit, Phrae, and Phayao. To the North and East, it borders Sainyabuli of Laos. Nan Province has a tropical savanna climate. Pua is a district in the central part of Nan Province and Doi Phu Kha National Park is Thailand's largest national park, covering several districts of Nan Province. Remarks: Cyphochilus usuparatch sp. nov. for the greenish iridescent scales, the ovoid shape of the body is morphologically close to C. latus Arrow and C. champasakensis sp. nov.; it can be readily separated from them by the unique form of the parameres (Figs. 24-26 vs. 10-12 and 4-6).

Cyphochilus vanlangensis sp. nov. (Figs. 27-29, 42) Holotype: VIETNAM: MHNG 1 ♂ // Vietnam - Hoa Binh Prov. / 6 km W of Tan Son, forest / edge, at light, 938 m / 20.7417977˚N / 104.9401984˚E (P) // 21-23.IV.2010 / leg. L. Papp, L. Pegovits, / Z. Soltész & G. Lengyel / VN2010PL_23 (P) // HOLOTYPUS ♂ / Cyphochilus / vanlangensis n. sp. / G. Sabatinelli, 2020 (P on red) //. Paratypes (3 specimens): MHNG 1 ♂ same collection records than the Holotype – MHNG 2 ♂♂ // Vietnam, Bac Kan Prov., / Ba Be NP, NA Mam forest, / 200 m, 22.417137 ˚N / 105.632505˚E, light trap (P) // 17-19.IV.2010 / leg. L. Papp, L. Pegovits, & Z. Soltész / VN2010PL_17 (P) // – All above specimens labeled as // PARATYPUS ♂ / Cyphochilus / vanlangensis mihi / G. Sabatinelli, 2020 (T on red) //.

Description of the Holotype male: Size – BL: 17.6 mm, BW: 7.2 mm, BWX: 9.5 mm, situated at midpoint of elytra. Color – Integument shiny light brown; dorsal surface with yellow scales uniformly distributed not densely aggregated along the sides of margins of upper part of the body. Head – CW/L: 3.5; edges of clypeus rounded, lateral edges of clypeus straight and divergent posteriad; frons large, making eyes relatively small (F/O: 5.3); antennal club longer than antennomeres 2-7 (A2-7/CL: 0.5). Pronotum – Transverse (PnW/L: 2.1), strongly convex; apical angles right and basal obtuse. Elytra – With five striae equally elevated. Thoracic sterna – Surface with long, yellow pubescence and very few scales; mesosternum not developed anteriorly. Abdomen – Sternites with sparse scales, absent in median part of the sternites; pygidium convex with apical margin narrowly reflected. Legs – Protibia tridentate the basal more distant than the two

______Mun. Ent. Zool. Vol. 15, No. 2, June 2020______310 ISSN 1306-3022 apical; apical tooth as long as the middle tooth. Aedeagus – Parameres asymmetric but quite simple in their morphology as in figures 27-29. Variability: BL: 17.5-18 mm; no major differences from the morphology of the holotypus. Female: unknown. Etymology: Van Lang was a legendary early nation state of the Vietnamese people. According to these legends, it covered most of modern northern Vietnam, and was ruled by the Hung Kings of the Hông Bang dynasty. Type locality: Hoa Binh is a province in northern Vietnam, southwest of Hanoi. It is known for its humid valleys and forests including the Tan Son forest approximately 20 km long and 15 km wide, located in a valley with high mountains in all sides. Remarks: Cyphochilus vanlangensis sp. nov. is a small yellowish species and it can be readily separated from all other congeners by the unique form of the parameres.

UNGRUPED species In this Section are temporarily accommodated species like Cyphochilus podicalis Moser, 1908, C. unidentatus Nomura, 1977 and the species here below described. All these species have unique morphological features that isolated them from the rest of Cyphochilus species.

Cyphochilus lanxangensis sp. nov. (Figs. 30-33, 43) Holotype: LAOS: MHNG 1 ♂ // NE Laos – Hua Phan Prov. / 35km S. Xam Neua, Phu Phan Mt. [?] / Ban Saleuey, 1200-1700m / 10.V.2006, leg. M.Pejcha (P) // HOLOTYPUS ♂ / Cyphochilus / lanxangensis mihi / G. Sabatinelli, 2020 (P on red) //. Paratypes (63 specimens): LAOS: MHNG 2 ♂♂, 1 ♀; same data than the Holotype – MNPC 5 ♂♂; CPAB 6 ♂♂; Laos-NE, Houa Phan prov. / 20˚13’09-19”N 103˚59’54”- / 104˚00’03”E 1480-1510m, / PHOU PANE Mt., 22.iv-14.v / 2008, Vít. Kubáň leg. (P) // – MHNG 1 ♂; LAOS, Houaphan pr. [Province] / Ban Saleuy, Sam Nua env. / 28.V-10.VI.2013, 1600m (P) // – MNPC 1 ♂; Laos – NE Hua Phan prov. / Ban Saluei, Phu Phan Mt. / 20-15N 104 02E [sic], 1500-2000m / D Hauck lgt, 26.IV-11.V.2001 (P) // – NMW 2 ♂♂; LAOS NE, Houaphan prov / 38km (road) S of Sam Neua / Ban Saleni [sic] 1350-1850m / 9-22.V.2009, Bednařil [leg.] (P) // – NMW 1 ♂, 2 ♂♂; NE LAOS, Houaphan pr. / Ban Saluei alt. 1500m / 30km S of Xam-Neua / 103˚59’33”E 20˚13’39”N / 6-17.V.2004, P. Kresl leg. (P) // – ARPC 1 ♂; LAOS Phongsali prov. / Oa-Tai 112.15-E 21.50 N / 1416m, 19-26 V 2008 / leg. via [sold by] Dr. Jingke Li (P on yellow) // – MHNG 7 ♂♂, 1 ♀; LAOS – Phongsali prov / Mauang Khoa distr. / Banm Phiangan, May 2014 (P) // – MHNG 6 ♂♂, 2 ♀♀; LAOS, Phongsali province / Muang Khoa district / Ban Phianglan, May 2014 (P) // MHNG 3 ♂♂; NE LAOS – 1500m / Xing Khang, 20.V.1996 (P) // – MHNG 1 ♂; Laos, Luang Nam / Tha prov. Bo Tien / 20.V-6.VI.2009 (P) //. MYANMAR: MHNG 8 ♂♂, 13 ♀♀; Myanmar, Madalay [Mandalay] prov. / Kyaukpadanng / 10.VI.2009, from [sold by] Li Jingke (P) //. All above specimens labeled as // PARATYPUS ♂ or ♀ / Cyphochilus / lanxangensis mihi / G. Sabatinelli, 2020 (P on red) //.

Description of the Holotype male: Size – BL: 17.2 mm, BW: 7.3 mm, BWX: 8.1 mm, subcylindrical. Color – Integument shiny light brown; dorsal surface with yellow narrow scales uniformly distributed not aggregated along the sides of pronotum and margins of elytra. Head – CW/L: 3.2; frontal margin straight, lateral margins divergent posteriad; frons large, making eyes relatively small

______Mun. Ent. Zool. Vol. 15, No. 2, June 2020______ISSN 1306-3022 311 (F/O: 4.19); antennal club, much longer than antennomeres 2-7 (A2-7/CL: 0.5). Pronotum – Transverse (PnW/L: 2), strongly convex; apical angles right, basal angles obtuse. Elytra – With five equally elevated striae. Thoracic sterna – Surface with long, white pubescence and very few scales; mesosternum not developed anteriorly, mesocoxae contiguous. Abdomen – Sternites with sparse scales except in the median part of the eight sternite; pygidium longitudinally convex with apical margin not reflected, ventral side of the pygidium flattened and expanded as in Fig. 33. Legs – Protibia bidentate, a third basal tooth vestigial and distanced from the two apical. Aedeagus – Parameres with several appendices crossing each other, right paramere with short setae in the ventral part and white scales in the dorsal one as in figures 30-32. Variability: BL: 17.2 -19 mm (x = 17.9, n = 50); no major differences from the morphology of the holotypus. Females: BL: 18.5-19.6 mm; BW: 7.4-7.6; BWX: 9.2-9.7; antennal club length subequal to the preceding antennomeres (A2-7/CL: 0.9); vestiture often with white scales more densely aggregate along the borders of the superior part of the body; protibiae with three equidistant tooth; eight sternite has a longitudinal furrow in the middle. Etymology: Lan Xang (Million Elephants) kingdom, from where Laos traces its history, was founded in the 14th century by a Lao prince Fa Ngum, whose father had his family exiled from the Khmer Empire. Type locality: Xam Neua, sometimes transcribed as Sam Neua or Samneua, literally "northern swamp", is the capital city of Houaphan Province, Laos, in a valley in the northeast of the country. Distribution. The species is known from three provinces of northern Laos: Hua Phan (also indicated as Houaphan) bordering Vietnam, Phongsali bordering Yunnan, Luang Namtha bordering Yunnan and Myanmar. Few specimens have the collection records indicating Mandalai Region of central Myanmar, which is quite distant from the other localities of North Laos; since these specimens were acquired from a Chinese insect seller, the presence of this species in Myanmar need to be confirmed by more reliable data. Remarks: Cyphochilus lanxangensis sp. nov. is quite isolated morphologically from all other congeners by the subcylindrical form of the body, the long antennal club, the particular shape of the pygidium and by the unique form of the parameres.

CHECKLIST OF THE GENUS CYPHOCHILUS WATERHOUSE, 1867

Type species: Melolontha candida Olivier, 1789 by subsequent designation (Medvedev, 1951: 231).

Etymology: The name is derived from the Greek words χιϕο=devided, χειλο = labrum.

Synthetic history of the genus: Waterhouse (1867): description of the genus and 5 species; Sharp (1876): description of 3 species; Nonfried (1893): description of one species; Fairmaire (1902): description of 2 species; Brenske (1903): description of 8 species; Dalla Torre (1912): catalogue of 26 species; Moser (1915): description of one species and syn. ventritectus Brenske, 1903 = ochraceosquamosus; Arrow (1938): description of one species) Medvedev (1951): designation of the type species = C. candidus (Olivier 1789); Frey (1971): description of one species; Sabatinelli and Pontuale (1998): description of

______Mun. Ent. Zool. Vol. 15, No. 2, June 2020______312 ISSN 1306-3022 Dedalopterus with redefinition of Malaisius Arrow, 1941 and Cyphochilus; Li & Yang (1999): revision of Malaisius and notes on Cyphochilus; Krajčik (2012): catalogue of 32 species; Bezdek (2016): catalogue 12 Palaearctic species. Sabatinelli (2020): Lectotypes designated for Melolontha candida Olivier, 1789, Cyphochilus cylindricus Brenske, 1903, C. flavomarginatus Frey, 1971, C. peninsularis Arrow, 1938, C. pygidialis Nonfried, 1893, C. pygidialis v. angeri Nonfried, 1893, C. septentrionalis Waterhouse, 1867, C. testaceipes Fairmaire, 1902, C. tricolor Waterhouse, 1867, and C. vestitus Sharp, 1876; Cyphochilus septentrionalis resurrected from synonymy with pygidialis; C. pygidialis Nonfried, 1893 syn. C. septentrionalis, C. cylindricus syn. C. proximus Sharp, 1876, C. vestitus syn. C. tricolor; Cyphochilus testaceipes transferred to Dasylepida Moser, 1913; C. candidus, C. carinchebanus Brenske, 1903, C. feae Brenske, 1903, C. flavomarginatus, C. obscurus Sharp, 1876, and C. peninsularis redescribed, distribution updated, paramera illustrated; description of: C: gandhii from NE India, C. hmong from Laos, C. leducthoi from Vietnam, C. orbachi from Vietnam, C. reichenbachi from Vietnam, C. rohingyae from West Malaysia, C. sansuukyii from Myanmar, C. satyarthii from Sikkim and West Bengal, C. tenzingyatsoi from Tibet, C. zuercheri from Thailand and Myanmar. apicalis Waterhouse, 1867 – China candidus (Olivier, 1789, sub Melolontha) – “India or.”; Nepal; India: Sikkim, West Bengal, Assam, Meghalaya, Manipur; Myanmar carinchebanus Brenske, 1903 – Myanmar champasakensis sp. nov. – Laos costulatus Bates, 1891 – China: Sichuan crataceus crataceus (Niijima & Matsumura, 1923, sub Lepidiota) in Niijima & Kinoshita, 1923 – Taiwan; syn. miwai Nakabayashi, 1939 crataceus taipeiensis Kobayashi & Yu, 1993 – Taiwan elongatus Brenske, 1894 – China: Jiujiang farinosus Waterhouse, 1867 – “North China” feae Brenske, 1903 – Myanmar flavomarginatus Frey, 1971 – Laos gandhii Sabatinelli, 2020 – India: West Bengal, Sikkim, Assam, Arunachal Pradesh hmong Sabatinelli, 2020 – Laos hongbangensis sp. nov. – Vietnam insulanus Moser, 1918 – Taiwan lanxangensis sp. nov. –Laos, Myanmar (?) latus latus Arrow, 1941 – Myanmar latus aisiqi ssp. nov. – China: Yunnan leducthoi Sabatinelli, 2020 – Vietnam manipurensis Nonfried, 1893 – India: Manipur marginalis Fairmaire, 1902 – China: Jiangxi mogokensis sp. nov. – Myanmar nguoithuong sp. nov. – Vietnam niveosquamosus (Blanchard, 1850) – India: Karnataka oberthueri Brenske, 1903 – India: Tamil Nadu obscurus Sharp, 1876 – Thailand, Laos ochraceus Moser, 1915 – China: Shandong orbachi Sabatinelli, 2020 – Vietnam peninsularis Arrow, 1938 – Thailand podicalis Moser, 1908 – Vietnam

______Mun. Ent. Zool. Vol. 15, No. 2, June 2020______ISSN 1306-3022 313 proximus Sharp, 1876 – Myanmar, syn. cylindricus Brenske, 1903 reichenbachi Sabatinelli, 2020 – Vietnam rohingyae Sabatinelli, 2020 – Malaysia sansuukyii Sabatinelli, 2020 – Myanmar satyarthii Sabatinelli, 2020 – India: Sikkim, West Bengal septentrionalis Waterhouse, 1867 – India: Uttar Pradesh, Sikkim, Assam; Meghalaya, West Bengal, Nagaland; Bangladesh; Nepal (?); syn. pygidialis Nonfried, 1893 tenzingyatsoi Sabatinelli, 2020 – China: Tibet tonkinensis Brenske, 1903 – Vietnam toungooensis sp. nov. – Thailand, Myanmar tricolor Waterhouse, 1867 –Thailand, Laos; Cambodia syn. C. vestitus Sharp, 1876 unidentatus Nomura, 1977 – Taiwan usuparatch sp. nov. – Thailand vanlangensis sp. nov. – Vietnam ventriglaber Brenske, 1903 – Vietnam ventritectus Brenske, 1903 – Vietnam; syn. C. ochraceosquamosus Moser, 1908 waterhousei Brenske, 1903 – “South India” wattanapanit sp. nov. – Thailand zuercheri Sabatinelli, 2020 – Thailand; Myanmar

ACKNOWLEDGEMENTS

I would like to thank the following curators of the Museums and Colleagues for the loan of the specimens and for their patience with my requests: Maxwell V.L. Barclay and Dmitry Telnov (BMNH), Luca Bartolozzi (MZUF), Ales Bezděk (Branisovska, Czech Republic), Jiří Hájek (NMPC), Milan Nikodým (Prague, Czech Republic), Andreas Reichenbach (Leipzig, Germany), Harald Schillhammer (NHMW), Isabelle Zuercher and Christoph Germann (NHMB). Special thanks to Giulio Cuccodoro for the use of the technical equipment of MHNG and for his advices on taxonomical issues, to David Carlson (U.S.A.), Denis Keith (Chartres, France) and Stefano Ziani (Geol@b, Faenza, Italy) for reviewing the text.

LITERATURE CITED

Arrow, G. J. 1938. Notes on some Melolonthine Coleoptera from the Malay Peninsula and descriptions of a few new species. Journal of the Federated Malay States Museums, 18: 267-278. Arrow, G. J. 1941. Entomological results from the Swedish expedition 1934 to Burma and British India (Coleoptera: Melolonthidae). Arkiv für Zoologi, 33A (8): 1-8. Blanchard, C. É. 1850. [new taxa]. In: Milne-Edwards H.: Catalogue de la Collection Entomologique du Muséum d’Histoire Naturelle de Paris. Classe des Insectes. Ordre des Coléoptères. Tome 1. Paris: Gide et Baudry, iv + 128 pp. Brenske, E. 1892. Beitrag zur Kenntnis der Gattungen Lepidiota und Leucopholis. Berliner Entomologische Zeitschrift, 37: 33-62. Brenske, E. 1894. Die Melolonthiden der palaearktischen und orientalischen Region im Königlichen naturhistorischen Museum zu Brüssel. Beschreibung neuer Arten und Bemerkungen zu bekannten. Memoires de la Société Entomologique de Belgique, 2: 3-87. Brenske, E. 1903. Neue Arten der Melolonthiden (Coleopt.) Gattung Cyphochilus. Insecten Börse, 20: 380-381. Burmeister, H. C. C. 1855. Handbuck der Entomologie. Vierter Band. Besondere Entomologie. Fortsetzung. Zweite Abtheilung. Coleoptera Lamellicornia Phyllophaga chaenochela. Berlin: Theod. Chr. Friedr. Enslin, x + 569 pp. Dalla Torre, K. W. von. 1912. Fam. Scarabaeidae, Subfam. Melolonthidae. In Junk, W. & Schenkling, S. (eds); Coleopterorum Catalogus. Vol. XX, pars 49. Berlin: W. Junk, 450 pp. Evenhuis, N. L. 2007. The insect and spider collections of the world website. Available at: http://hbs.bishopmuseum.org/codens/ [Last accessed: 1 December 2019]. Fairmaire, L. 1902. Descriptions de Coléoptères recueillis en Chine par M.de Latouche. Annales de la Société entomologique de France, 1902: 316-318. Frey, G. 1971. Neue Ruteliden und Melolonthiden aus Indien und Indochina. Entomologische Arbeiten aus dem Museum G. Frey, 22: 109-133. Li, C. & Yang, P. 1999. Revision of the genus Malaisius Arrow (Coleoptera: Scarabaeidae: Melolonthinae). The Canadian Entomologist, 131 (2): 187-202.

______Mun. Ent. Zool. Vol. 15, No. 2, June 2020______314 ISSN 1306-3022 Kobayashi, H. & Yu, C. K. 1993. Notes on the genus Cyphochilus from Taiwan (Coleoptera, Scarabaeidae). Chinese Journal of Entomology, 13: 347-353. Krajčik, M. 2012. Checklist of the World Scarabaeoidea. Animma.X, supplement 5. Plzen, Czech Republic, 278 pp. Medvedev, S. I. 1951. Plastinchatousye (Scarabaeidae), posdem. Melolonthinae, ch. 1 (chrushchi). Fauna SSSR, zhestkokrylye. Tom. 10, vyp. 1. Moskva, Leningrad: Izd. Akad. Nauk. SSSR, 512 pp. Moser, J. 1908. Verzeichnis der von H.Fruhstorfer in Tonkin gesammelten Melolonthiden. Annales de la Société entomologique de Belgique. Bruxelles, 52: 325-343. Moser, J. 1913. Beitrag zur Kenntnis der Melolonthiden (Col.). Deutsche Entomologische Zeitschrift, 1913: 271-297. Moser, J. 1915. Beitrag zur Kenntnis der Melolonthiden (Col.) IV. Deutsche Entomologische Zeitschrift, 1915: 113-151. Nakabayashi, H. 1939. On a new variety of Cyphochilus insulanus Moser, Scarabaeidae. Transactions of the Kansai Entomological Society, 8: 139-140 (in Japanese). Niijima, Y. & Kinoschita, E. 1923. Die Untersuchungen über japanische Melolonthiden II. (Melolonthiden Japans und ihre Verbreitung). Research Bulletins of the College Experiment Forest, College of Agriculture, Hokkaido Imperial University (Sapporo), 2: 1-253 + 1-7 [index] pp., vii pls (in Japanese, German abstract). Nomura, S. 1977. On the Melolonthini of Taiwan (Coleoptera, Scarabaeidae). Tôhô-Gakuhô, 27: 85-109. Nonfried, A. F. 1893. Beiträge zur Käferfauna von Manipur (Vorderindien). Berliner entomologische Zeitschrift, 38: 327- 340. Olivier, G. A. 1789. Entomologie, ou Histoire naturelle des insectes, avec leurs caractères générique et spécifiques, leur description, leur synonymie et leur figures enluminées. Coléoptères. Tome premier. Paris: Baudoin, xx + 497 pp., 65 pls. [genera paginated separately]. Sabatinelli, G. 2020. Taxonomic notes on the genus Cyphochilus Waterhouse 1867 (Coleoptera, Scarabaeoidea, Melolonthinae) with description of 10 new species. Revue suisse de Zoologie, 127 (1) (in press). Sabatinelli, G. & Pontuale, G. 1998. Description of the new genus Dedalopterus and notes on genus Malaisius Arrow and Cyphochilus Waterhouse. Lambillionea, 98 (1): 60-76. Sharp, D. 1876. Description of some new species of Scarabaeidae from tropical Asia and Malaisia. Part III (Melolonthini). Coleopterologische, 15: 65-90. Torre-Bueno, J. R., Tulloch, G. S. & Schuh, R. T. 1989. The Torre-Bueno Glossary of Entomology. New York Entomological Society, 840 pp. Waterhouse, C. O. 1867. On some new lamellicorn belonging to the family Melolonthidae. The Entomologist’s Monthly Magazine, 4: 141-146.

Figures 1-3. Cyphochilus wattanapanit sp. nov. Holotype – Parameres in (1) dorsal, (2) right and (3) left view.

Figures 4-6. Cyphochilus champasakensis sp. nov. Holotype – Parameres in (4) dorsal, (5) right and (6) left view.

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Figures 7-9. Cyphochilus hongbangensis sp. nov. Holotype – Parameres in (7) dorsal, (8) right and (9) left view.

Figures 10-12. Cyphochilus latus latus Arrow, 1941. Lectotype – Parameres in (10) dorsal, (11) right and (13) left view.

Figures 13-15. Cyphochilus latus aisiqi ssp. nov. Holotype – Parameres in (13) dorsal, (14) right and (15) left view.

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Figures 16-18. Cyphochilus mogokensis sp. nov. Holotype – Parameres in (16) dorsal, (17) right and (18) left view.

Figures 19-20. Cyphochilus nguoithuong sp. nov. Holotype – Parameres in (19) dorsal and (20) right view.

Figures 21-23. Cyphochilus toungooensis sp. nov. Holotype – Parameres in (21) dorsal, (22) right and (23) left view.

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Figures 24-26. Cyphochilus usuparatch sp. nov. Holotype – Parameres in (24) dorsal, (25) right and (26) left view.

Figures 27-29. Cyphochilus vanlangensis sp. nov. Holotype – Parameres in (27) dorsal, (28) right and (29) left view.

Figures 30-33. Cyphochilus lanxangensis sp. nov. Holotype – Parameres in (30) dorsal, (31) right and (32) left view; (33) pygidium in ventral view.

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Figures 34-43. Holotype habitus of: (34) Cyphochilus wattanapanit sp. nov. – (35) C. champasakensis sp. nov. – (36) C. hongbangensis sp. nov. – (37) C. latus aisiqi ssp. nov. – (38) C. mogokensis sp. nov. – (39) C. nguoithuong sp. nov. – (40) C. toungooensis sp. nov. – (41) C. usuparatch sp. nov. – (42) C. vanlangensis sp. nov. – (43) C. lanxangensis sp. nov. Scale bar: 10 mm.