Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Adults. Crepuscular and nocturnal. Antennae of males simple; simply-ciliate. Face smooth.
Wingspan 28–40 mm. Forewings relatively broad. The outer margin of the forewing convexly curved, or convexly curved to more or less straight. Forewings pale grey or fuscous, with darker transverse markings; predominantly fuscous, or grey, or pale fuscous, or pale grey; with a clear discal mark, or without a clear discal mark; without a median band. Hindwings plain; light grey, paler than the forewings; predominantly pale grey; without a clear discal mark; transversely lined (with two obscure posterior striae).
Vein 10 of the forewings arising independently of 9; arising independently, anastomosing with 11 and 9 to form a double 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 4-spurred.
Early stages. Larvae feeding on diverse deciduous trees and shrubs, Calluna.
British representation. 4 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, Southern Scotland, Northern Scotland, Wales, and Ireland. Living adults found September to November. E. autumnata (The Autumnal Moth), E. christyi (Pale November Moth), E. dilutata (November Moth), E. filigrammaria (Small Autumnal Moth).
Illustrations. • E. dilutata (November Moth) and E. autumnata (Autumnal Moth), with Operophtera and Perizoma: Newman 1869. • Epirrita dilutata (November Moth): pale and melanic forms (photos). • E. dilatata, with other Larentiinae (‘Carpets’): Kirby 50.
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’.