The genus Polystenus (Hymenoptera: Braconidae: Doryctinae) in China, with descriptions of two new species

The species of Polystenus Foerster, 1862 (Hymenoptera: Braconidae: Doryctinae) from China are revised, and four species are recognized. Two new species, P. brevitergum sp nov. and P. taiwanus sp nov., are described and illustrated. A key to all species of the genus Polystenus is provided.