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Flies of the genera Bostrichopyga Becker, 1894 and Paracosmetopus Hackman, 1956 are reviewed. Genera diagnosis and redescriptions of species of both genera are given. Bostrichopyga borealis Hendel, 1903 is synonymised with Bostrichopyga crassipes (Zetterstedt, 1838). Description of female of P. helleni and photos of abdominal sternites and genitalia for B. borealis are given for the first time. РЕЗЮМЕ. Дан обзор двукрылых родов Bostrichopyga Becker, 1894 и Paracosmetopus Hackman, 1956. Приведены диагнозы родов и переописаны виды для каждого рода. Bostrichopyga borealis Hendel, 1903 есть новый младший синоним Bostrichopyga crassipes (Zetterstedt, 1838). Впервые описана самка P. helleni и даны фотографии стернитов брюшка и гениталий самца B. borealis.

A review of species of the genera Bostrichopyga Becker, 1894 and Paracosmetopus Hackman, 1956 (Diptera: Scathophagidae)