A new species of Calogalesus Kieffer from China (Hymenoptera, Diapriidae) with a key to World species.

A new species of Calogalesus Kieffer, 1912, Calogalesus sinicussp. n., is described and illustrated, collected from a Chinese prickly ash (Zanthoxylum bungeanum Maxim.) orchard in Yunnan province of China. This is the third described species of the genus in the World. The new species can be distinguished from the other two described Calogalesus species by the head profile, proportions of the antennal segments, tridentate mandible, and mandible length. A key to World species of the genus is provided.