| Summary: | Docosia fasciculata Polevoi, sp. n. https://zoobank.org/NomenclaturalActs/ 219F5214-51D5-4D05-BA69-2F6413EF180F Figs 15–20 TYPE MATERIAL. Holotype – ♂, Russia : Yakutia, River Khotokho, middle part, 61.064° N, 113.367° E, 315 m, 15.VIII 2018, A. Burnasheva leg. [ZISP, INS _ DIP_0001009]. DIAGNOSTIC CHARACTERS. Small species with black body, partly darkened legs and transparent wings. Resembles Docosia landrocki Lastovka et Sevcik, 2006 and D. caucasica Kurina et Kirik, 2021 by dense submedian tufts of modified setae on posteroventral margin of conocoxites (Kurina & Kirik, 2021: Figs 2 B, 3 B). Differs from both species by the shape of gonostylus. The latter is similar to that of D. mulleri Plassmann, 1986 (Fig. 21), but lacking deep apical excision on its ventral branch. Most of the Nearctic species of Docosia are poorly documented, but as we can judge from available descriptions and illustrations (Johannsen, 1912; Garrett, 1925; Van Duzee, 1928; Fisher, 1937; Taber, 2011, 2012, 2018) none of them is similar to new species. DESCRIPTION. Male. Head, face and clypeus black. Three ocelli placed almost in line; lateral ocellus almost touching compound eye, separated from eye margins by less than half of their own diameter. Mouthparts black, palpi dark brown. Scape and pedicel dark brown (flagellum missing). Thorax. Mesonotum, pleurae and scutellum black, with pale setae. Laterotergite and mediotergite bare. Haltere dark yellow. Wing (partly missing). Length ca. 3 mm. Preserved part hyaline. Sc pale yellow, ends in R1. Radial veins and r-m dark brown. Legs (partly missing). All coxae yellow and darkened basally. Trochanters blackish. Femora mostly yellow, fore and mid femur dark along entire ventral margin, hind femur darkened ventrally at base. Tibiae mostly yellow; fore and mid tibia darkened dorsally. Fore tarsus seem darker because of dense setae. Spur of fore and mid tibia yellow. Ratio of tibia to basitarsus for fore leg: 1.37. Abdomen black with pale hairs. Terminalia dark brown. Posteroventral margin of ...
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