Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Adults. Antennae of males bipectinate; bipectinate to the apex. Face smooth.
Wingspan 35–40 mm. The outer margin of the forewing convexly curved. Forewings light brownish-ochreous, with four conspicuous, dark transverse line; with a clear discal mark (this blackish), or without a clear discal mark. Forewings of the male without a fovea. Hindwings conspicuously patterned; coloured like the forewings; not predominantly green, yellow, or black; without a clear discal mark; transversely lined (with three conspicuous lines, the first missing).
Hindwings lacking a tubular vein 5. 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 separate.
Posterior tibiae of males 4-spurred.
Early stages. Larvae feeding on Erica, Calluna, Cytissus.
British representation. 1 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, Southern Scotland, Northern Scotland, Wales, and Ireland (common). Living adults found June and July. P. strigillaria (Grass Wave).
Illustrations. • Aspitates, Dyscia, Glacies, Perconia, Siona: Newman. • Ennominae: Aspitates, Semiothisa, Perconia, Siona (Kirby).
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’.