The Stegana (Steganina) coleoptrata Species-group (Diptera, Drosophilidae), with Descriptions of Two New Species and New Records from Eastern Palearctic Region

Two new species of Stegana (Steganina) coleoptrata species-group, viz. St. xuei sp. nov. and St. sidorenkoi sp. nov., are reported from northern China and the Russian Far East. Two known species of the same species-group, viz. St. baechlii LASTOVKA et MACA, 1982 and St. nigrithorax STROBL, 1898, are newly recorded from the Russian Far East and Japan and from the Russian Far East, Central China and Taiwan, respectively, and are supplementarily described.