REVISION OF PALEARCTIC STIPHROSOMA, INCLUDING THE ANTHOMYZA LAETA-GROUP (DIPTERA, ANTHOMYZIDAE)

The genus Stiphrosoma Czemy, 1928 is revised and redefined to include species of the Anthomyza laeta-group and its relationships are discuss ed. Four Palaearctic species are recognized: Stiphrosoma sabulosum (Ha liday, 1837), S. fissum sp. n. (North Korea), S. cingulatum (Haliday, 1855) comb. n., and S. laetum (Meigen, 1830) comb. n. All available ty pe material was revised and 4 lectotypes are designated; all species a re (re)described, illustrated, keyed and their relationships, biology and distribution surveyed. Wing polymorphism of S. sabulosum is discus sed and sexual dichroism in S. fissum sp. n. and S. cingulatum is desc ribed.