A new species of Passaloecus Shuckard (Hymenoptera, Crabronidae) from China, with a key to Oriental species.

A new species of Passaloecus Shuckard, P.birugatus Bashir & Chen, sp. nov. , is described and illustrated from Yunnan Province, China. The new species can be easily distinguished from known species of Passaloecus by its very long petiole, which is distinctly longer than wide, obscure scrobal suture, propodeum rugae and striations, body punctation, and coloration. An identification key to the Oriental species of Passaloecus is given.