[Systematics of black flies of the genus Phoretodagmia Rubzov]

A key for identification of species of the genus Phoretodagmia is given. Lectotype and paralectotypes of the species Ph. ephemerophila (Rubzov) are designated. The species name obicumbensis Rubzov is considered as a junior synonym of the species name ephemerophila (Rubzov).