Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Adults. Antennae of males with short, paired processes on either side of each joint, emitting fascicles of cilia; fasciculate-ciliate.
Wingspan 30–34 mm. The outer margin of the forewing convexly curved. Forewings light grey, or whitish-fuscous, sprinkled darker; with a clear discal mark (this dark fuscous). Forewings of the male with a fovea. Hindwings conspicuously patterned to plain; light grey or whitish-fuscous, sprinkled darker, cf. the forewings; with a clear discal mark to without a clear discal mark; transversely lined (with wavy lines, at least outer, often the middle, outer and submarginal lines expressed more or less sharply).
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 foliage of Betula.
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 May and June. Aethalura punctulata (Grey Birch Moth).
Illustrations. • A. punctulata (Grey Birch), with Boarmia, Bupalus, Ectropis, Ematurga, Serraca, Tephronia: Newman. • A. punctulata, with other Ennominae: Kirby 48.
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’.