Review of the genus <i>Synacra</i> Förster, 1856 (Hymenoptera: Diapriidae: Belytinae) of Japan, with description of a new species

Abstract The Japanese species of the genus Synacra Förster are taxonomically revised. In total six species are recognized. Synacra foveata sp . n . is described as new to science based on specimens from Kyushû. The association of the male and female of the new species was confirmed based on the mitochondrial gene cytochrome c oxidase submit I ( COI ). Three species are newly recorded for Japan: S . atracta Macek, 1995, S . brachialis (Nees, 1834), S . compressigastra Chemyreva &amp; Kolyada, 2020. A new host record for S . paupera is provided for Japan. A taxonomic key to 13 species of Synacra occurring in the Palaearctic region is presented.