A Review of Species of the Genus Brachyopa (Diptera, Syrphidae) from Russia, with Description of New Species from Tajikistan

摘要

Two new species of the genus Brachyopa Meigen are described from Tajikistan. B. paradoxa sp. n. clearly differs from the congeners in the structure of 3rd antennal segment, which is not oval, but cylindrical and elongate. B. stackelbergi sp. n. is closely related to B. insensilis Collin, but differs in the presence of a distinct tuft hairs on the procpimeron and in the structure of the genitalia. A list of the species of this genus, distributed over territory of Russia, is provided. The genus includes about 20 Palaearctic species (Peck, 1988; Mutin and Barkalov, 1999). Owing to recent publications including a detailed description of the male genitalia, the taxonomy of the genus has been clarified and new synonyms of some previously described species have been established (Thompson, 1980; Kaplan and Thompson, 1981; Thompson and Torp, 1982). Of special note is Pellmann's (1998) study, in which the genitalia of most of the European species are figured in detail.