The fauna of Tydeidae Western Siberia is reviewed. A total 27 species from eight genera were found in Tyumen and Kurgan Regions. Two species, Lorryia sibiriensis n. sp. L. speciosa are described as new for science; evansi Baker recorded Russia the first time redescribed based on materials Region; paravarsoviensis (Momen Lundqvist), subularoides Kaźmierski, arkadiensis Panou Emmanouel, argutus (...