Genus Diaparsis Förster, 1869

Diaparsis is a large genus of almost worldwide distribution (unknown only from the Neotropical region) with about 110 described species (Yu et al. 2016). The genus is most species-rich in tropical Asia where it comprises almost half of species of the tersilochine fauna (Khalaim 2011). Palaearctic species of the genus were reviewed by Khalaim (2002 a, 2005). Thirteen species, including two unidentified taxa, were recorded from South Korea (Balueva et al. 2013b).

Four species of Diaparsis occur in Japan (Kusigemati 1980; Khalaim 2005): D. (Diaparsis) hyperae Kusigemati, D. (Pectinoparsis) improvisator Khalaim, and two species listed below.

Species of Diaparsis have been reared from the beetle families Buprestidae, Cerambycidae, Chrysomelidae and Curculionidae, and in Europe one species has been reared from sawfly genera Pontania Costa and Phyllocolpa Benson ( Hymenoptera: Tenthredinidae) (Yu et al. 2016).