RESEARCH ARTICLE. Chrysotus Meigen (Diptera: Dolichopodidae) from Inner Mongolia with descriptions of two new species

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1 RESEARCH ARTICLE TAES 142: ISSO Chrysotus Meigen (Diptera: Dolichopodidae) from Inner Mongolia with descriptions of two new species Ruosi Liu, Ning Wang & Ding Yang [RSL] Beijing Entry-Exit Inspection and Quarantine Bureau Technology Center, Beijing , China [NW] Institute of Grassland Research, Chinese Academy of Agricultural Sciences, Hohhot, Inner Mongolia , China [DY] Department of Entomology, China Agricultural University, Beijing , China (RSL); (NW); (NW: corresponding author) ABSTRACT A revision of the genus Chrysotus Meigen from Inner Mongolia, China is presented. Ten species are herein recorded. The following two species are described as new to science: Chrysotus cerciaffiliatus Liu, Wang & Yang, sp. nov. and Chrysotus neimengguensis Liu, Wang & Yang, sp. nov. Five species are recorded from Inner Mongolia for the first time: Chrysotus biprojicienus Wei & Zhang, Chrysotus femoratus Zetterstedt, Chrysotus minuscapillumus Liu et Yang, Chrysotus motuoensis Liu et Yang and Chrysotus pennatus Lichtwardt. A key to the species of Chrysotus from Inner Mongolia is provided. Key words: Diptera, Dolichopodidae, Chrysotus, Inner Mongolia, China, new species INTRODUCTION The genus Chrysotus Meigen, 1824 is the largest genus of the subfamily Diaphorinae, with more than 420 species distributed worldwide now. Among them, 76 species are known from the Palaearctic Region (Yang et al. 2011, Negrobov et al. 2014, Negrobov et al. 2015, Liu et al. 2015, Wang et al. 2016). Some of these species are known to occur in more than one biogeographical region. So far as known 178 species occur in China (Yang et al. 2011, Wei & Zhang 2010, Wei 2012a, Wei 2012b, Liu et al. 2013, Wei et al. 2014, Liu et al. 2015, Liu et al. 2016). Inner Mongolia has a temperate continental monsoon climate and is located in northwest and northeast China. The territory belongs to the Palaearctic Region. Three species of the genus Chrysotus were known to occur in Inner Mongolia before. In this paper, two species of Chrysotus are described as new to science and five species are recorded from Inner Mongolia for the first time. A key to the species of Chrysotus from Inner Mongolia is presented. MATERIAL AND METHODS This study was based on specimens collected mainly in 2006 to 2014 from Inner Mongolia using sweep nets. The specimens were stored in ethanol, and they are deposited in the Entomological Museum of China Agricultural University (CAU), Beijing. Morphological terminology for adult structures mainly follows McAlpine (1981). Terms for the structures of the male genitalia follow Cumming & Wood (2009). The following abbreviations are used: acr acrostichal bristle, ad anterodorsal bristle, av anteroventral bristle, d dorsal bristle, dc dorsocentral bristle, LI fore leg, LII mid leg, LIII hind leg, pd posterodorsal bristle, v ventral bristle, CuAx ratio length of m-cu / length of distal portion of CuA. Publication date: 22 September 2016 urn:lsid:zoobank.org:pub:b12f8646-b618-45ef-a288-8c4934c53399

2 156 CHRYSOTUS FROM INNER MONGOLIA TAXONOMY Genus Chrysotus Meigen Chrysotus Meigen, 1824: 40. Type species: Musca nigripes Fabricius, Lyroneurus Loew, 1857: 38. Type species: Lyroneurus coerulescens Loew, Diagnosis The genus can be distinguished from other Diaphorinae members by the following characters: Body small to medium-sized, metallic green; males and females with frons wider than face, and most males eyes contiguous on face; face parallel-sided or narrowing downward; eyes shortly haired; male eyes very narrowly separated or contiguous on face (occasionally widely separated), with enlarged facets toward face; arista long, located at tip; R 4+5 and M parallel apically. Male genitalia: Surstylus not branched, apically with short hairs and (or) 1 2 spine-like bristles; epandrial lobe long and broad; cercus small. Some species of the genus are similar to Diaphorus, but can be separated by the arista located at tip and tergite 8 without strong bristles (Yang et al. 2011). Remarks Yang et al. (2006) provided a list of synonymy of the genus. Key to species (males) of Chrysotus from Inner Mongolia 1 Epandrium with characteristic angular projection posteriorly Chrysotus laesus-group sensu Wei & Zhang (2010) Epandrium without or only with slight angular projection posteriorly /other species group Apex of hypandium near parallel with apex of lateral epandrial lobe... 3 Apex of hypandium far behind apex of lateral epandrial lobe Chrysotus femoratus 3 Hind tibia black......chrysotus neimengguensis Hind tibia yellow with black base and apex......chrysotus biprojicienus 4 Cercus with one affiliated lobe......chrysotus cerciaffiliatus Cercus normal, without lobe Epandrium vestigial, far behind apex of lateral epandrial lobe; lateral epandrial lobe triangular, with sharp apex... 6 Epandrium normal, at most little behind apex of lateral epandrial lobe; lateral epandrial lobe with round apex Hind tibia and tarsus with 2 rows of dense bristles Chrysotus pennatus Hind tibia without rowed bristles, only tarsomere 1 with 1 row of short v Chrysotus suavis 7 Fore coxa mainly yellow; apex of phallus with hollow or truncated Fore coxa brown to black; apex of phallus with 2 sheet-like structure Fore coxa yellow; apex of phallus with hollow Chrysotus cilipes Fore coxa yellow with black base; apex of phallus truncated.... Chrysotus pseudocilipes 9 Base and apex of fore femur yellow, ventral side with more yellow base and apex; apex of phallus with 2 sheet-like structure, one short and another relatively long Chrysotus motuoensis Base and apex of fore femur yellow, ventral side without more yellow base and apex; apex of phallus with 2 sheet-like structure same in length Chrysotus minuticapillatus 1. Chrysotus biprojicienus Wei & Zhang, 2010 (Figs. 1, 9) Chrysotus biprojicienus Wei & Zhang, 2010: 10. Type locality: China: Guizhou (Shibing: Yuntaishan) Diagnosis Femora blackish; all tibiae yellow except base, apex of hind tibia blackish. Epandrium with angular projection posteriorly. Hypandrium with somewhat pointed end, slightly projecting beyond level of waved distal margin of

3 RUOSI, WANG, & YANG 157 lateral epandrial lobe. Apex of phallus with two lateral lobes. Specimens examined 1 male, China, Inner Mongolia: Daqinggou, Xiaoqinghu, N, E, m, 2013.VII.20, X. Zhang; 1 male 3 females, China, Inner Mongolia: Daqinggou, primeval forest, N, E, 180 m, VII.22, N. Wang & D. Yang. Distribution China (Inner Mongolia, Guizhou, Hainan, Shanxi, Tibet, Yunnan). Remarks The species is first reported in Inner Mongolia. 2. Chrysotus cilipes Meigen, 1824 Chrysotus cilipes Meigen, 1824: 41. Type locality: Gegend von Hamburg. Chrysotus callidus Parent, 1944: 124. Type locality: China Diagnosis Postpedicel transversely oval. Fore coxa yellow; mid and hind coxae black. Mid tibia with 2 ad; hind tibia with long hairs on anterior side, their length more than twice as long as diameter of tibia, apex with group of long hairs on ventral surface. Apex of hypandium near parallel with apex of lateral epandrial lobe. Apex of phallus with hollow. Distribution China (Inner Mongolia, Ningxia, Jilin, Shaanxi, Hebei, Tianjin, Shandong), Zaire, England, Switzerland, Finland, France, Denmark, Germany, Hungary, Romania, Czech, Slovakia, Poland, Italy, Spain, former Yugoslavia, Russia, Mongolia. 3. Chrysotus cerciaffiliatus sp. nov. (Figs. 2, 10, 17, 18) urn:lsid:zoobank.org:act:01cf949b-3ff6-432b- B479-C34373F6400A Diagnosis Legs mainly brown. Fore and mid femora with somewhat yellow apex; fore tibia yellow, mid tibia onward yellow from base. Hind tibia with row of v, 2 ad and 3 pd. Surstylus long and straight, with acute end, apex with 1 spine. Cercus with sunk part, with moderated hairs, and with crescent affiliated part beneath. Apex of phallus with 3 lobes. Description Body length mm, wing length mm. Head metallic green with pale gray pollinosity; eyes contiguous on face. Hairs and bristles on head black, postocular bristles (including postero-ventral hairs) somewhat pale. Antenna dark brown; first flagellomere nearly subtriangular, 1.5 times wider than long. Proboscis brown with pale brown hairs; palpus brown with 1 black bristle at apex. Thorax metallic green with pale gray pollinosity. Hairs and bristles on thorax black; 5 strong dc, 6 7 irregularly paired acr short and hairlike; scutellum with 2 pairs of bristles, basal pair short and hair-like, lateral pair long; proepisternum with 1 long black bristle on lower part and 1 short black bristle on upper part. Legs mainly brown. Fore and mid femora with somewhat yellow apex; fore tibia yellow, mid tibia onward yellow from base, hind tibia with pale apex; fore tarsomeres 1 3 yellow, bases of mid and hind tarsomere 1 somewhat pale. Hairs and bristles on legs black. Fore coxa with anterior hairs and bristles at apical half; mid coxa with long hairs and bristles; hind coxa with 1 outer bristle at basal 1/5. Hind trochanter with 1 bristle at middle. Fore and mid femora with row of weak av and pv; hind femur with row of av and pv. Mid tibia with 2 strong ad at basal 1/5 and 1/2; apically with 3 4 bristles. Hind tibia with row of v, 2 ad and 3 pd; apically with 3 4 bristles. All legs with claws and pulvilli. Relative length of tibia and 5 tarsomeres of legs LI : 4.0 : 2.0 : 0.9 : 0.5 : 0.3 : 0.3 ; LII : 5.0 : 2.4 : 1.2 : 0.7 : 0.5 : 0.5 ; LIII : 5.6 : 1.6 : 1.2 : 0.7 : 0.5 : 0.5. Wing hyaline; veins blackish, R 4+5 and M parallel apically; CuAx ratio 0.3. Squama pale with 5 brown bristles. Halter pale yellow. Abdomen metallic green with pale gray pollinosity; hairs and bristles on abdomen black. Tergites 1 6 with posterior bristles, tergite 8 with 2 bristles. Male genitalia: Epandrium with slightly angular projection posteriorly. Lateral epandrial lobe protruded and wide, with 3 bristles at apex. Apex of hypandium near parallel with apex of lateral epandrial lobe. Surstylus long and straight, with acute end, apex with 1 spine. Cercus with sunk part, with moderated hairs, and with crescent affiliated part beneath. Apex of phallus with 3 lobes. Female. Unknown. Specimens examined HOLOTYPE male,

4 158 CHRYSOTUS FROM INNER MONGOLIA China, Inner Mongolia: Daqinggou, primeval forest, N, E, 180 m, 2014.VII.22, N. Wang & D. Yang. PARATYPE: 1 male, same as holotype. Distribution China (Inner Mongolia). Etymology The specific epithet refers to the cercus cerci with the affiliated part affiliatus. Chinese name Remarks The new species can be easily distinguished from other Chrysotus by the cercus with the crescent affiliated part beneath. 4. Chrysotus femoratus Zetterstedt, 1843 (Figs. 3, 11) Chrysotus femoratus Zetterstedt, 1843: 483. Type locality: Denmark (Amager, Dania). Chrysotus licenti Parent, 1944: 125. Type locality: China (Tcheuly: Tielingssen, Tongling, Tcheufangkeou). Diagnosis Mid and hind coxae black. Femora yellow. Mid tibia with 2 strong ad. Epandrium with characteristic angular projection posteriorly. Apex of hypandium far behind apex of lateral epandrial lobe. Apex of phallus with two dorsal processes. Specimens examined 2 males, China, Inner Mongolia: Saihanwula, Zhenggou, N, E, 1200 m, 2013.VII.23, X. Zhang, collected by light trap. Distribution China (Inner Mongolia, Jilin, Shaanxi, Hebei), England, Switzerland, Finland, France, Belgium, Denmark, Germany, Hungary, Romania, Czech, Slovakia, Norway, Netherlands, Italy, Russia, Mongolia. Remarks The species is first reported in Inner Mongolia. 5. Chrysotus minuscapillumus Liu et Yang, 2016 (Figs. 4, 12) Chrysotus minuscapillumus Liu et Yang, 2016: 105. Type locality: Mongolia (Hentiy Aimag). Diagnosis Legs mainly brown; all trochanters yellow; bases and apices of all femora yellow; fore and mid tibiae yellow, hind tibia yellow with brown apex. Fore tibia with 1 2 weak ad and 1 weak pd; mid tibia with 2 strong ad and 2 3 pd; hind tibia with 2 ad and 3 pd. Postgonite developed, somewhat narrow at apex, 4 5 times as long as wide. Apex of phallus with a fan-like structure. Specimens examined 1 male 3 females, China, Inner Mongolia: Xilinguole, Dongwuqi, N, E, 552 m, 2014.VII.14, Y. N. Lv; 6 males 20 females, China, Inner Mongolia: Chaidamunuoer, N, E, 1062 m, VII.15, Y. N. Lv; 3 females, China, Inner Mongolia: Aershan, Wuliquan, N, E, 1035 m, 2014.V II.26, N. Wang & D. Yang; 12 females, China, Inner Mongolia: Helanshan Mountain, Yaoba, Huangqukou, N, E, 2218 m, 2010.VII.31, Y. Li & W. N. Cui; 5 males 16 females, China, Inner Mongolia: Helanshan Mountain, Halawubeigou, Huangtuliangzi, 39 8 N, E, 1940 m, 2010.VII.26, L. H. Wang; 15 males 25 females, China, Inner Mongolia: Keerqinhansumu, N, E, 460 m, 2008.VII.19, G. Yao; 13 males 16 females, China, Inner Mongolia: Helanshan Mountain, Shuimogouhougou, N, E, 2000 m, 2010.VIII.4, L. H. Wang. Distribution China (Inner Mongolia), Mongolia. Remarks The species is first reported in China (Inner Mongolia). 6. Chrysotus motuoensis Liu et Yang, 2013 (Figs. 5, 13) Chrysotus motuoensis Liu et Yang, 2013: 173. Type locality: China (Tibet: Linzhi, Motuo). Diagnosis All trochanters yellow; base and apex of fore femur yellow, especially ventral side with more yellow base and apex, basal 1/4 and apical 1/5 of mid femur yellow, basal 1/3 of hind femur brown yellow; fore and mid tibiae yellow, hind tibia yellow to dark brown from base to apex. Apex of phallus with 2 sheet-like structure, one short and other relatively long. Specimens examined 2 males, China, Inner Mongolia: Xilinguole, Dongwuqi, N, E, 552 m, 2014.VII.14, Y. N. Lv. Distribution China (Inner Mongolia, Tibet). Remarks The species is first reported in the Palaearctic region, Inner Mongolia.

5 RUOSI, WANG, & YANG Chrysotus neimengguensis sp. nov. (Figs.6, 14, 19, 20) urn:lsid:zoobank.org:act:19f d7d-46af- 89E BB1 Diagnosis First flagellomere nearly subtrapezoidal, 1.6 times wider than long. Fore coxa yellow with brown base; mid and hind coxae black. Fore femur black on dorsal side; mid and hind femora mainly black except basal 1/2 of ventral side yellow. Hind tibia black. Lateral epandrial lobe protruded and wide, with 3 bristles at apex. Apex of phallus with 1 fan-like structure. Description Body length mm, wing length mm. Head metallic green with pale gray pollinosity; eyes contiguous on face. Hairs and bristles on head black, postocular bristles (including postero-ventral hairs) somewhat pale. Antenna dark brown to black, scape and pedicel black, flagellomere dark brown; first flagellomere nearly subtrapezoidal, 1.6 times wider than long. Proboscis dark brown with brown hairs; palpus dark yellow with 1 black bristle at apex. Thorax metallic green with pale gray pollinosity. Hairs and bristles on thorax black; 6 dc (5 strong and 1 weak), 6 8 irregularly paired acr short and hair-like; scutellum with 2 pairs of bristles, basal pair short and hair-like, lateral pair long; proepisternum with 1 long black bristle on lower part and 1 short black bristle on upper part. Legs mainly yellow. Fore coxa yellow with brown base; mid and hind coxae black. Fore femur black on dorsal side; mid and hind femora mainly black except basal 1/2 of ventral side yellow. Hind tibia black. Fore and mid tarsi from tip of tarsomere 1 onward dark brown; hind tarsus dark brown. Hairs and bristles on legs black. Fore coxa with row of bristles at apex; mid coxa with long hairs and bristles; hind coxa with 1 outer bristle at basal 1/5. Mid trochanter with 1 weak bristle on upper side and 1 strong bristle on lower side; hind trochanter with 1 bristle at middle. Hind femur with 3 av apically. Fore tibia with 1 pd at basal 1/5, apically with 3 4 bristles. Mid tibia with 2 strong ad (at basal 1/5 and 1/2) and 2 weak pd; apically with 4 bristles. Hind tibia with 2 rows of weak a, 2 ad and 3 4 pd; apically with 4 bristles. All legs with claws and pulvilli. Relative length of tibia and 5 tarsomeres of legs LI : 5.0 : 2.5 : 1.2 : 1.0 : 0.8 : 0.8 ; LII : 6.2 : 3.2 : 1.5 : 1.1 : 0.8 : 0.8 ; LIII : 7.1 : 2.1 : 1.9 : 1.1 : 0.8 : 0.8. Wing hyaline; veins blackish, R 4+5 and M parallel apically; CuAx ratio Squama pale with pale hairs. Halter pale. Abdomen metallic green with pale gray pollinosity; hairs and bristles on abdomen black. Male genitalia: Epandrium with angular projection posteriorly. Lateral epandrial lobe protruded and wide, with 3 bristles at apex. Apex of hypandium nearly parallel with apex of lateral epandrial lobe. Surstylus somewhat long and curved, with acute end, apex with 1 spine. Cercus short and wide, with moderated bristles. Apex of phallus with 1 fan-liked structure. Female. Body length mm, wing length mm. Similar to male, but eyes widely separated and hind tibia without 2 rows of weak a. Specimens examined HOLOTYPE male, China, Inner Mongolia: Saihanwula, Dadonggou, N, E, 1200 m, 2013.VII.24, X. Zhang. PARATYPE: 1 male, the same as HOLOTYPE; 1 male, China, Inner Mongolia: Jiufeng Mountain, Eerdaogou, N, E, m, 2013.VII.30, X. M. Lu; 12 males 5 females, China, Inner Mongolia: Saihanwula, Zhenggou, N, E, 1200 m, 2013.VII.23, X. Zhang. Distribution China (Inner Mongolia). Etymology The specific epithet refers to the locality of the holotype Neimenggu in Chinese spelling. Chinese name Remarks The new species is similar to Chrysotus femoratus Zetterstedt in the similar epandrium with characteristic angular projection posteriorly and surstylus curved with the acute end, but can be separated from the apex of hypandium near parallel with apex of lateral epandrial lobe. In C. femoratus, the apex of hypandium is far behind apex of lateral epandrial lobe (Yang et al. 2011).

6 160 CHRYSOTUS FROM INNER MONGOLIA 8. Chrysotus pennatus Lichtwardt, 1902 (Figs. 7, 15) Chrysotus pennatus Lichtwardt, 1902: 197. Type locality: Former Yugoslavia (Novi). Diagnosis Hind tibia and tarsus with 2 rows of dense bristles. Mid and hind tarsomere 1 with row of v. Epandrium vestigial, far behind apex of lateral epandrial lobe. Lateral epandrial lobe triangular, with sharp apex. Apex of phallus sharp and bifurcated. Specimens examined 1 male, China, Inner Mongolia: Daqinggou, Xiaoqinghu, N, E, 236 m, 2014.VII.23, N. Wang & D. Yang Distribution China (Inner Mongolia, Beijing, Hebei), former Yugoslavia, Hungary, Italy, Russia. Remarks The species is first reported in Inner Mongolia. 9. Chrysotus pseudocilipes Hollis, 1964 Chrysotus pseudocilipes Hollis, 1964: 99. Type locality: Nepal (Taplejung). Diagnosis Fore coxa yellow with black base. Hind tibia with 5 6 pd and a row of approximately 18 av. Lateral epandrial lobe with round apex. Apex of phallus truncated. Distribution China (Inner Mongolia, Jilin, Xinjiang, Ningxia, Gansu, Beijing, Shandong, Fujian), Nepal. 10. Chrysotus suavis Loew, 1857 (Figs. 8, 16) Chrysotus suavis Loew, 1857: 49. Type localities: Austria (Cöln). Diagnosis All coxae black with yellow apex; all femora with yellow apex. Hind tibia with 4 pd and 4 apical bristles. All tarsomere 1 with 1 row of short v. Epandrium vestigial, far behind apex of lateral epandrial lobe. Lateral epandrial lobe triangular, with sharp apex. Specimens examined 3 males 30 females, China, Inner Mongolia: Dongsheng, N, E, 1464 m, 2006.VIII.7, M. L. Sheng. Distribution China (Inner Mongolia, Beijing, Xinjiang), Finland, England, France, Belgium, Poland, Holland, Germany, Austria, Hungary, Romania, Italy, Denmark, Czech, Slovakia, former Yugoslavia, Russia, Mongolia, Egypt, Zaire. ACKNOWLEDGEMENTS We are grateful to Mr. Xiao Zhang, Ms. Xiumei Lu, Ms. Lihua Wang and Ms. Weina Cui (Beijing), Prof. Maoling Sheng and Dr. Yan Li (Shenyang), and Dr. Gang Yao (Hangzhou) for collecting specimens. The research was funded by the National Natural Science Foundation of China ( , , ) and the Ministry of Science and Technology of the People s Republic of China (2005DKA21402). REFERENCES Cumming JM & Wood DM (2009) Adult Morphology and Terminology. In: Brown, B.V., Borkent, A., Cumming, J.M., Wood, D.M., Woodley, N.E. & Zumbado, M.A. (Eds.), Manual of Central American Diptera, Vol. 1. NRC Research Press, Ottawa, pp Hollis D (1964) On the Diptera of Nepal (Stratiomyidae,Therevidae and Dolichopodidae). Bulletin of the British Museum (Natural History) Entomology, 15(4): Lichtwardt B (1902) Neue ungarische Dolichopodiden (Diptera). Termeszetrajzi Füzetek, 25: Liu RS, Wang MQ & Yang D (2013) Chrysotus Meigen (Diptera: Dolichopodidae) from Tibet with descriptions of four new species. Zootaxa, 3717 (2): Liu RS, Wang MQ & Yang D (2015) Chrysotus Meigen (Diptera: Dolichopodidae) from Shanxi, China, with descriptions of two new species. Zoological Systematics, 40 (1): Liu RS, Bian Y, Wang MQ & Yang D (2016) Chrysotus Meigen (Diptera: Dolichopodidae) from Hainan island with descriptions of four new species. Transactions American

7 RUOSI, WANG, & YANG 161 Entomological Society, 142: Loew H (1857) Neue Beiträge zur Kenntniss der Dipteren. Fünfter Beitrag. Programme der Königlichen Realschule zu Meseritz, 1857: Loew H (1857) Dipterologische Mitteilungen. Wiener Entomologische Monatschrift, 1: McAlpine JF (1981) Morphology and terminology - Adults. [Chapter] 2. In: McAlpine, J.F., Peterson, B.V., Shewell, G.E., Teskey, H.J., Vockeroth, J.R. & Wood, D.M. (Coords.), Manual of Nearctic Diptera, Volume 1. Agriculture Canada Monograph, 27: Meigen JW (1824) Systematische Beschreibung der bekannten europäischen zweiflügeligen Insekten. Vol. 4. Hamm, xii pp., pls Negrobov OP, Barkalov AV & Selivanova OV (2014) Two new species of Chrysotus Meigen (Diptera: Dolichopodidae) from Siberia, with a key to the Siberian species. Zootaxa, 3815 (3): Negrobov OP, Maslova OO & Fursov VN (2015) New data on the genus Chrysotus Meigen, 1824 (Diptera: Dolichopodidae) from Japan and Russia. Far Eastern Entomologist, N 293: Parent O (1944) Diptères Dolichopodides recueillis en Chine du Nord, en Mongolie et en Mandchourie par le R. P. E. Licent. Revue francaise d Entomologie, 10(4): Wang MQ, Liu RS, Przhiboro A & Yang D (2016) New species of Dolichopodidae from eastern Mongolia (Diptera). Zoological Systematics, 41(1): Wei LM (2012a) Chrysotus Meigen (Diptera: Dolichopodidae) from China with descriptions of new species. Oriental Insects, 46 (1): Wei LM (2012b) The evolutionary significance on fr/fa ritio of Chrysotus Meigen (Diptera, Dolichopodidae, Diaphorinae), with descriptions of one new genus and five new species. Acta Zootaxonomica Sinica, 37 (3): Wei LM & Zhang LL (2010) A taxonomic study on Chrysotus Meigen (Diptera: Dolichopodidae) from southwest China: descriptions of eleven new species belonging to the redefined C. laesus-group. Zootaxa, 2683: Wei LM, Zhang L & Zhou ZX (2014) A review of the genus Chrysotus Meigen (Diptera: Dolichopodidae) from China with definition of papuanus species group. Oriental Insects, 48 (3 4): Yang D, Zhang LL, Wang MQ & Zhu YJ (2011) Fauna Sinica Insecta Vol. 53. Diptera Dolichopodidae. Science Press, Beijing, 1912 pp. Yang D, Zhu YJ, Wang MQ & Zhang LL (2006) World Catalog of Dolichopodidae (Insecta: Diptera). China Agricultural University Press, Beijing. 704 pp. Zetterstedt JW (1843) Diptera Scandinaviae. Disposita et descripta, 2:

8 162 CHRYSOTUS FROM INNER MONGOLIA Figures 1 8. Male habitus, lateral view. 1. Chrysotus biprojicienus; 2. Chrysotus cerciaffiliatus Liu, Wang & Yang, sp. nov.; 3. Chrysotus femoratus; 4. Chrysotus minuscapillumus; 5. Chrysotus motuoensis; 6. Chrysotus neimengguensis Liu, Wang & Yang, sp. nov.; 7. Chrysotus pennatus; 8. Chrysotus suavis. Scale bars = 1 mm.

9 RUOSI, WANG, & YANG 163 Figures Male antenna, lateral view. 9. Chrysotus biprojicienus; 10. Chrysotus cerciaffiliatus Liu, Wang & Yang, sp. nov.; 11. Chrysotus femoratus; 12. Chrysotus minuscapillumus; 13. Chrysotus motuoensis; 14. Chrysotus neimengguensis Liu, Wang & Yang, sp. nov.; 15. Chrysotus pennatus; 16. Chrysotus suavis. Scale bars = 0.1 mm.

10 164 CHRYSOTUS FROM INNER MONGOLIA Figures Chrysotus cerciaffiliatus Liu, Wang & Yang, sp. nov. (male). 17. genitalia, lateral view, scale bars = 0.1 mm; 18. apex of phallus, ventral view, scale bars = 0.05 mm.

11 RUOSI, WANG, & YANG 165 Figures Chrysotus neimengguensis Liu, Wang & Yang, sp. nov. (male). 19. genitalia, lateral view, scale bars = 0.1 mm; 20. apex of phallus, ventral view, scale bars = 0.05 mm.