Chimney-sweeper

In Europe its range extends from the Iberian Peninsula through western and central Europe and the British Isles. Further east to Sakhalin and the Amur-Ussuri region. In the north, the limit is central Fennoscandia. To the south it occurs from Italy to the Balkans. In Austria, the previously mass-occurring species has become today in many places rare; many populations have disappeared. The wingspan is 23–27 mm. The length of the forewings is 12–15 mm. Almost entirely black, the extreme apex and apical fringe of the forewing white. In O. a. pyrenaica, from the Pyrenees and central Italy, the wings, but especially the forewing, are more or less strongly dusted with brownish yellow. In ab. O. a. nigerrima, Paul Thierry-Mieg described from a single female without exact locality, the white apex and apical fringe are absent.