Abstract
The genus Diolcogaster Ashmead, 1900 (Hymenoptera, Braconidae, Microgastrinae) from China is revised and keyed, with nine new species, namely Diolcogaster bifurcifossasp. n., Diolcogaster brevivenasp. n., Diolcogaster grammatasp. n., Diolcogaster ineminenssp. n., Diolcogaster laetimediasp. n., Diolcogaster pluriminitidasp. n., Diolcogaster praritassp. n., Diolcogaster punctatiscutumsp. n. and Diolcogaster translucidasp. n. described and illustrated, and one species, Diolcogaster perniciosa (Wilkinson, 1929) recorded for the first time from China. A key to the Chinese species of this genus is provided.