Revision of the ant-parasitizing genus Pseudacteon Coquillett (Diptera, Phoridae) from China.

The ant-parasitizing genus Pseudacteon Coquillett from China is revised. Nineteen species are recorded, of which nine are new to science: P. robustisetosus sp. nov., P. inticlinatus sp. nov., P. reticulatus sp. nov., P. linzhiensis sp. nov., P. shennongjianus sp. nov., P. yunnanensis sp. nov., P. calceoliformis sp. nov., P. tianmuensis sp. nov., and P. parviflavus sp. nov. The species P. botulpalpatus Disney et Michailovskaya, P. rudisetosus Disney et Michailovskaya, P. setipalpatus Disney et Michailovskaya, P. setosus Disney et Michailovskaya, P. pullum Michailovskaya and P. formicarum (Verrall) are recorded for the first time in China. The putative female of P. pullum Michailovskaya and the putative males of P. trapeziformis Zhang et Liu and P. setipalpatus Disney et Michailovskaya are also newly described. All known species are redescribed and illustrated. A key to species from China is presented.