摘要
In Central Yakutia of the Russian Federation 21 species and subspecies of horseflies of two genera are revealed:Chrysops(6 species)and Hybomitra(15 species and 1 subspecies).There are two marked species(dark forms):H.bimaculata var.bisignata and H.montana var.flaviceps.The most numerous species being the main center of population on pastures are 6:Hybomitra montana montana,H.lundbecki lundbecki,H.ciureai,H.arpadi,H.nitidifrons nitidifrons,H.nigricornis(in the amount of 81.46%fees).On the plain pastures Chrysops divaricatus is specified for the first time.
