First report of Eutrichosomella Girault (Hymenoptera, Aphelinidae) from China, with description of a new species.

The genus Eutrichosomella Girault is recorded for the first time from China (Yunnan Province), and Eutrichosomellayunnanensis sp. nov. (♀, ♂) is described and illustrated. A distribution map of this genus is presented.