Description of a new louse fly species of the genus Ornithomya Latreille, 1802 (Diptera: Hippoboscidae) from Irkutsk, Russia

A new species of the genus Ornithomya Latreille, 1802 (Diptera: Hippoboscidae), O. helvipennis sp. n., is described from Irkutsk (Russia). The microtrichia of this new species cover the entire wing membrane, as in the species O. comosa Austen, 1930. The new species differs from the closest O. comosa by light wing membrane and amber-yellow microtrichia, and from O. greeni Maa, 1986 by presenting ocelli. The comosa species-group for O. comosa, O. greeni and O. helvipennis sp. n. within the genus Ornithomya is proposed. An updated key for species of the genus Ornithomya occurring in Russia is provided.