(figs 1 –2, 4)
Xylota cuprina Coquillett, 1898: 327, ♂ holotype, “No 3999 USNM ”, “ Japan Mitsukuri”, [National Museum of Natural History, Washington DC], examined, nom. praeocc., nec Bigot (1885).
Xylota coquilletti Hervé-Bazin, 1914: 409, replacement name for Xylota cuprina Coquillett, 1898; Mutin & Gilbert (1999: 50, fig. 3); Mutin & Barkalov (1999: 492).
Xylota coquilletti amamiensis Shiraki, 1968: 122, ♂ holotype, “ V- 15-1953 Ryukyu Is. T. Shiraki”, “ [Zelima] coquilletti amamiensis v. nov. ♂ det. T. Shiraki” [National Institute for Agro-Environmental Sciences, Tsukuba, Japan], examined, syn. nov.
Xylota silvicola Mutin, 1988 a: 103, ♂ holotype, «Ниж. Амур, р. Горин, верх. кл. Сиутару, 2.VII. [19] 85, Мутин» (Russian Far East, Khabarovsky Krai, near Komsomolsk-na-Amure), [Zoological Institute, St. Petersburg], examined. Junior subjective synonym of Xylota cuprina Coquillett, 1898 according to Mutin & Gilbert (1999); Mutin, 1988 b: 121, the repeated description. Junior primary homonym and objective synonym of Xylota silvicola Mutin, 1988 a.
Xylota huangshanensis He & Chu, 1992: 6, figs 11–14, ♂ holotype, Anhui: Huangshan, [Shanghai Agricultural College], not examined. Junior subjective synonym of Xylota cuprina Coquillett, 1898 according to Mutin & Gilbert (1999). Xylota vulgaris Yang & Cheng in Cheng & Yang, 1993: 330, figs 15–16, ♂ holotype, Guizhou: Huishui [Beijing Agricultural University], not examined, syn. nov.
Zelima coquilletti: Stackelberg, 1952: 320 (Zelima), part.
Remarks. When Coquillett (1898) described X. cuprina based on two males from Japan, he wrote in the original description that the “ type ” has the number 3999. The type specimens of X. cuprina were examined by Mutin in the National Museum of Natural History (Washington, DC). The holotype of X. cuprina (= X. coquilletti) with the label "No. 3999 " has genitalia similar to those of the X. aeneimaculata species-group sensu Hippa (1978). The study of its genitalia established the synonymy of X. cuprina and X. silvicola (figs 1–2) with X. coquilletti. The description of X. silvicola was published twice (Mutin, 1988 a, 1988 b). Based on the male genitalia of X. huangshanensis He & Chu, 1992, the latter can also be identified as a junior synonym of X. coquilletti (Mutin & Gilbert 1999). According to the figures of the male genitalia in the description of X. vulgaris Yang & Cheng, 1993, this name should also be identified as a junior subjective synonym of X. coquilletti.
Examined material. Holotype of X. silvicola Mutin, ♂, RUSSIA: Khabarovsky Krai, lower reaches of Gorin river, the headwater of Siutaru stream, 2.VII. 1985, leg. V. Mutin, [Zoological Institute of the Russian Academy of Sciences, St.-Petersburg, Russia (ZIN)]. Paratypes of X. silvicola Mutin: ♂, same data as holotype; ♂, Primorsky Krai, 30 km N from Terney, 13.VIII. 1982, leg. V. Mutin, [Amurskii Humanitarian-Pedagogical State University (AmHPSU)]. Holotype of X. coquilletti amamiensis Shiraki, ♂, JAPAN: Ryukyu Is., Amami, Shinokawa, 15.V. 1953, leg. T. Shiraki, [National Institute for Agro-Environmental Sciences, Tsukuba, Japan (NIAES)]. Other material: ♂, RUSSIA: Khabarovsky Krai, Myaochan mountains, 19.VIII. 1996, leg. D. Gritskevich, [AmHPSU]; ♂, JAPAN: Honshu, Tottori Prefecture, Mt. Daisen, 6.VII. 1966, leg. T. Okadome, [Institute of Systematics and Ecology of Animals, Novosibirsk, Russia (ISEA)].
Distribution. Russia: Primorsky Krai, southern part of Khabarovsky Krai; Japan: Hokkaido, Honshu, Ryukyu Islands; China (Guizhou).