Revision of the genus Colasia Koch, 1965 (= Belousovia Medvedev, 2007, syn. nov.) (Coleoptera, Tenebrionidae, Blaptini).

The relationship between the genera Colasia Koch, 1965 and Belousovia Medvedev, 2007 within the tribe Blaptini is discussed, and a new synonymy is proposed: Belousovia Medvedev, 2007, syn. nov. of Colasia Koch, 1965. As a result, three new combinations are established: Colasiahelenae (Medvedev, 2007), comb. nov. , C.kabakiintermedia (Medvedev, 2007), comb. nov. , and C.kabakikabaki (Medvedev, 2007), comb. nov. Colasiaakisoides Koch, 1965 is redescribed, and a lectotype is designated. Three new species of the genus Colasia are described and illustrated from China: C.bijica sp. nov. (Guizhou), C.medvedevi sp. nov. (Yunnan), and C.pilosa sp. nov. (Yunnan). A distribution map and a key to species of the revised genus Colasia are presented.