Hydrotaea atrisquama Ringdahl, 1925 Material examined. RUSSIA: Altai Republic: 23♂ 5♀, Seminskiy Pass, Turala River valley, 50.99°N 85.68°E, 1350 m asl, 8– 13.07.2016, leg. N. Vikhrev; 1♂, Seminskiy Pass env., Sarlyk River valley, 51.11°N 85.60°E, 1200 m asl, 28– 30.06.2016, leg. N. Vikhrev (ZMUM). Remarks. Vikhrev (2015b) suggested that Hydrotaea atrisquama Ringdahl, 1925 has a more northern distribution than the taxonomically and ecologically related Hydrotaea parva Meade, 1889. Records of both species in the Altai Mountains have confirmed this suggestion: Hydrotaea atrisquama was collected at elevations from 1200 to 1350 m asl, whereas Hydrotaea parva was found only at 360 to 840 m asl. Both species are attracted to horse dung. Distribution. Palaearctic: mostly in northern and eastern parts; Oriental: N Myanmar.

Published as part of Vikhrev, Nikita E. & Sorokina, Vera S., 2017, Taxonomic notes and faunistic data on the Muscidae (Diptera) of the Altai Mountains (Russia), pp. 241-254 in Zootaxa 4311 (2) on page 243, DOI: 10.11646/zootaxa.4311.2.5, http://zenodo.org/record/847538