Description of two mountain midges (Diptera, Chironomidae, Diamesinae) from China

Two new species, Pagastia (s. str.) laojun sp. nov. and Pseudodiamesa (s. str.) neobranickii sp. nov. are described based on the males collected from Mt. Laojun, Yunnan Province, Oriental China. In addition, Pseudodiamesa (s. str.) branickii agg. collected from Mt. Tien is noted here. The first new species is characteristic by the anal point with round apical peg and gonostylus with distinct outer heel. While the latter is a typical member of Pseudodiamesa (s. str.) branickii group, distinguished from congeners by the prominent crista dorsalis in the middle of the gonostylus and a clear protuberance bearing several apical setae in the medio-outer surface of gonocoxite. This is the first report of the branickii-group species in China.