Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Adults. Antennae of males simple; minutely simply-ciliate. Face rough (with a short cone of scales).
Wingspan 22–26 mm. Forewings relatively narrow-elongate to relatively broad; about 2 times as long as wide. The outer margin of the forewing convexly curved. Forewings whitish, or whitish-fuscous; with a clear discal mark (this black); with a distinct median band to without a median band (the dark band well distinguished only near the costa, or fading towards the hind margin). Hindwings plain; grey; predominantly grey, or pale grey; with a clear discal mark (this darker); transversely lined (faintly), or without transverse lines.
Vein 10 of the forewings arising independently of 9; arising out of 11 and anastomosing with 9 to form a simple areole. 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.
Posterior tibiae of males 4-spurred.
Early stages. Pupae Salix.
British representation. 1 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, Wales, and Ireland. Living adults found in June. P. sexalata (Small Seraphim).
General comments. Hindwings of the male with a dorsal, doubly folded lobe.
Illustrations. • Acasis, Aplocera, Asthena, Carsia, Chesias, Discoloxia, Euchoeca, Hydrelia, Lithostege, Lobophora, Minoa, Odezia, Pterapherapteryx, Trichopteryx: Newman 1869.
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’.