A contribution to the knowledge of Scathophagidae (Diptera) from Japan, with description of a new species

New knowledge of the Japanese Scathophagidae is presented. Seven species of the genus Scathophaga Meigen, 1803 are reviewed with a newly recorded S. yakutica Ozerov, 2017 from Japan. Scathophaga hadleyi Ozerov, 2013 is revived from a synonym of S. intermedia Walker, 1849. Scatomyza Fallén, 1810 which was resurrected by Ozerov and Krivosheina (2011) is regarded as a synonym of Scathophaga . A new species of Norellisoma kurahashii sp. nov. is described from Hokkaido. Norellisoma lituratum (Meigen, 1826), Cleigastra leucostoma (Zetterstedt, 1846) and Cordilura grunini Ozerov et Krivosheina, 2017 are newly recorded from Japan. Keys to the Japanese species of Scathophaga, Norellisoma, Cleigastra and Cordilura are also provided.