A new species of Metopiinae (Hymenoptera, Ichneumonidae) parasitizing lepidopteran larvae in China.

A new species of Metopiinae, Trieces etuokensis Sheng, sp. n. , is described and illustrated. Specimens were reared from two species of Lepidoptera: Bazaria turensis (Ragonot, 1887) (Pyralidae) from Balong, Dulan, Qinghai Province, and an unidentified psychid (Psychidae) from Mukainor, Etuoke, Inner Mongolia Autonomous Region, China. The new species is characterized by a yellow face and clypeus, fore and middle femora and hind tibia mainly black, antennae slightly longer than head and mesosoma combined, with 17 flagellomeres, occipital carina entirely absent, and the hind femur being compressed, 2.5 times as its long as maximum width.