Abstract
A new genus and species of Encyrtidae (Hymenoptera: Chalcidoidea), Apteronotus Kang, Hu & Luo, gen. nov. (type species A.indigus Kang, Hu & Luo, sp. nov.), associated with insects inhabiting Oxytropis spp., and three newly recorded species for China, Copidosomaclavatum, Ericydnusaeneus and Tetracnemuskozlovi, are described from the Altun Mountain Nature Reserve, Xinjiang. Detailed illustrations of all species were included to support the identification and further study.