New data on the fauna of the family Dolichopodidae (Diptera) from Russia, with a description of a new species of the genus <i>Argyra </i>Mcq.
During studies of materials housed in the Department of Ecology and Systematics of Invertebrate Animals, Voronezh State University (VSU), in the Siberian Zoological Museum of the Institute of Systematics and Ecology of Animals, Siberian Branch of RAS (Novosibirsk) (SZMN) and in the Zoological Institute (St Petersburg) (ZI), 14 species of Dolichopodidae were found and knowledge of their distributions greatly improved. Hydrophorus rogenhoferi Mik and Rhaphium latimanum Kah. were found to be present in Russia for the first time, and Dolichopus uralensis Stack. and Hydrophorus norvegicus Ringd. were found for the first time in Siberia. In addition to well-known 75 species of the Altai fauna, three new species are given, one of which, Argyra bickeliana Negrobov, Barkalov et Selivanova, sp.n., is described as new for science. This species is close to A. setimana Lw. but differs by its completely black femora and by the absence of large yellow spots on the tergum III of the abdomen. The holotype of A. bickeliana is deposited in the Siberian Zoological Museum.