New data on the fauna of the flies of Chrysops divaricatus (Diptera: Tabanidae) on flat pastures of the Central Yakutia

Horseflies forming the family Tabanidae, are found in almost all countries, including in the Russian Federation. 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 и 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 94,31 % fees). On the plain pastures Chrysops divaricatus is specified for the first time.