Review of the genus Plutothrix Förster, 1856 (Hymenoptera, Pteromalidae) with a key to Palaearctic species

The species of Plutothrix Förster, 1856 are reviewed. Plutothrix gribanovi, sp. nov., is described from Russia, P. longigaster, sp. nov., and P. zerovae, sp. nov., are described from Finland and Russia. The male of P. canariensis Hedqvist, 1974 is described for the first time. The species Plutothrix transdanuviana (Erdös, 1946), syn. nov., is synonymized under Seladerma antennatum (Walker, 1833). The following new records are reported: Plutothrix nudicoxa Graham, 1993 and P. perelegans Graham, 1993 from Finland, P. obtusiclava Graham, 1993 and P. zhangyieensis Yang, 1996 from Russia, and P. perelegans Graham, 1993 from Ukraine. An identification key to females of all Palaearctic species of Plutothrix is provided.