Revision of the genus Diphora (Diapriidae: Belytinae) of the West Palaearctic

The genus Diphora Förster, 1856 is revised in the circumscription of two previously known species, D. westwoodii Förster, 1856 and D. nearctica Whittaker, 1931. Two species are described as new to science: D. belytoides sp. nov., which has been found in Norway and the Murmansk Province of Russia, and D. claviscapus sp. nov., which originates from the Republic of Karelia and the Chelyabinsk Province of Russia. An identification key for three Palaearctic species of Diphora is presented. New distribution data and illustrations are provided for all Palaearctic species of the genus. Diphora nearctica Whittaker, 1931 is confirmed as a distinct species, and its lectotype (female) is designated. The diagnoses of the genus and species are clarified.