Two new species of the genus Ancistrocerus Wesmael (Hymenoptera, Vespidae, Eumeninae) from China, with a key to the Oriental species

Two new species, namely Ancistrocerus transpunctatus You and Li, sp. n. and Ancistrocerus deqinensis You and Li, sp. n. are described and illustrated from Yunnan, China. A key to the Oriental species of the genus Ancistrocerus is provided.