Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Adults. Diurnal (flying in the sunshine). Antennae of males simple; evenly simply-ciliate. Face rough (with projecting scales).
Wingspan 27–30 mm. The outer margin of the forewing convexly curved. Forewings uniformly black, save for the white apical cilia; without a clear discal mark. Hindwings plain; uniformly black; predominantly black; without a clear discal mark; without transverse lines.
Vein 10 of the forewings arising independently of 9. Hindwings exhibiting a tubular vein 5. Vein 5 of the hindwings arising from about the middle of the transverse vein, or arising from below the middle of the transverse vein (?). Vein 8 of the hindwings approximated to or anastomosed with the upper margin of the cell to the middle or beyond. Hindwing veins 6 and 7 stalked.
Early stages. Larvae feeding on flowers of Conopodium.
British representation. 1 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, Southern Scotland, Northern Scotland, Wales, and Ireland. Living adults found June and July. O. atrata (Chimney Sweep).
Illustrations. • O. atrata (Chimney Sweeper), Acasis, Aplocera, Asthena, Carsia, Chesias, Discoloxia, Euchoeca, Hydrelia, Lithostege, Lobophora, Minoa, Pterapherapteryx, Trichopteryx: Newman 1869. • O. atrata (Chimney Sweeper), with other Larentiinae: Kirby 49.
To view the illustrations with detailed captions, go to the interactive key. This also offers full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae. Version: 8th June 2016. delta-intkey.com’.