Review of Walker, 1834 (Hymenoptera, Chalcidoidea, Asaphesinae) from Xinjiang, China.

Four species of the cosmopolitan genus Walker, 1834 (Hymenoptera: Chalcidoidea: Asaphesinae, family incerta sedis) are recorded from Xinjiang Uyghur Autonomous Region, China, bringing the number of known species in China to eight. In addition to (Nees ab Esenbeck), 1834 and Walker, 1834, Li & Zhang, is newly described based on females and Girault, 1917, previously known only from North and South America, is newly recorded from China. These four species are differentiated using an integrative taxonomic approach that includes COI barcode data and morphometrics, and are illustrated using macrophotography.