Two new species of the genus Cordilura Fallén, 1810 (Diptera, Scathophagidae) from the Russian Far East.

Cordilura Fallén, 1810 is one of the largest genera within the family Scathophagidae. According to new species descriptions and recent catalogues (e.g. Šifner, 2008), the genus currently comprises 86 species in the World distributed primarily in the Holarctic Region: 50 species are known in Palaearctic and 43 in Nearctic, with 7 species with a Holarctic distribution; and other 2 species are recorded in Oriental Region (Ozerov & Krivosheina, 2012a; 2013). In Russia, 33 species are known, 25 of them in the Russian Far East (Ozerov & Krivosheina, 2014). Cordilura is distinguished from other genera of the Scathophagidae by the following combination of characters: 1) katepisternum with one seta (upper posterior) only, 2) palpus with strong apical (subapical) seta about as long as or longer than palpus, 3) fore femur and fore tibia without ventral rows of long spinous setae, 4) proepisternum is covered with hairs at middle or on anterior part. Almost all species of Cordilura whose habits are known are primary borers in culms of Carex and Scirpus spp. (Cyperaceae) (Ferrar, 1987). During examination of the material from the collection of Scathophagidae in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia (ZISP), two undescribed species were recognized, and the descriptions of these species are given below.