| Summary: | Macrorrhyncha nocticolor Polevoi, sp. n. https://zoobank.org/NomenclaturalActs/ 3205A079-F374-4555-A185-DE3988B2D4EE Figs 8–14 TYPE MATERIAL. Holotype – ♂, Russia : Yakutia, River Uyandina, Dyargalakh, 11 km SSE of Uyandi, 69.217° N, 141.017° E, 175 m, 8.VIII 2017, A. Popov leg. [ZISP, INS _DIP_0001008]. DIAGNOSTIC CHARACTERS. Medium-sized species with almost completely black body, brownish legs and transparent wings. Resembles several European species ( Macrorrhyncha guichardi Chandler, 1994; M. veleka Bechev, 1992; M. geranias (Loew, 1870); M. atticae Kurina, 2004) by black body color and bare mediotergite, but distinguished by the structure of male terminalia, especially the wide triangular dorsal process of gonocoxites, bearing 5 setae medially. Generally black North American Macrorrhyncha coxalis (Loew, 1870) has scutellum yellow laterally and darkened knob of halter, while in new species scutellum is completely black and halter is uniformly brown. DNA BARCODE BIN REGISTRY. Uniquely assigned to BIN BOLD:AEO8712, with distance 7.22% to the nearest BIN BOLD:AEJ6886, containing unidentified Keroplatidae. DESCRIPTION. Male. Head black. Face, clypeus and mouthparts black. Distance from ventral margin of eye to tip of labellum 1.8 times as long as eye height. Antenna black, fifth flagellomere 1.3 times as long as wide. Palpi black. Thorax. Mesonotum black with yellow humeral callus. Thinly gray dusted but more or less shining in posterior view, with irregularly biserial ac, 2–4 serial ds and numerous setae along lateral margins. All setae are black. Pleurae black. Laterotergite and mediotergite bare. Scutellum black. Wing. Length 3.83 mm. Wing hyaline, veins yellowish-brown. C extending approximately to the middle between tips of R5 and M1. Sc ending free opposite the base of Rs. Distance between tips of R1 and R4 about as long as R4. Radiomedial fusion 0.3 times as long as stem of M1-M2. All veins with macrotrichia, except bare Sc, Rs, R4, base of M1 and M2, stem of M1-M2, tb, mcu and basal part of Cu1b. Halter ...
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