Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Adults. Antennae of males simple; simply-ciliate. Face rough (with a short cone of scales).
Wingspan 16–22 mm. The outer margin of the forewing convexly curved. Forewings pale brownish-ochreous, striated fuscous; with a clear discal mark (this dark, transversely elongate). Hindwings conspicuously patterned; coloured and marked like the forewings; with a clear discal mark to without a clear discal mark; transversely lined.
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. Hindwing veins 6 and 7 stalked.
Posterior tibiae of males 2-spurred (in females also?).
Early stages. Larvae feeding on flowers of Ulex, Cytissus, Erica, etc.
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 April and May, or July and August. G. rufifasciata (Double-striped Pug).
Illustrations. • Gymnoscelis rufifasciata (Double-striped Pug).
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’.