Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Adults. Crepuscular and nocturnal. Antennae of males simple. Face rough.
The outer margin of the forewing slightly sigmoid-curved, or convexly curved. Forewings not predominantly green, yellow, or black; reddish ochreous brown or dull purplish; predominantly ochreous, or brown, or purple, purplish, red, pinkish or rosy; with a clear discal mark (this black); with a distinct median band (this pale), or without a median band. The outer margin of the hindwings smooth. Hindwings conspicuously patterned to plain; light ochreous grey, terminally purplish in A. derivata; predominantly pale ochreous, or pale grey, or purple, purplish, red, pinkish or rosy and pale grey; with a clear discal mark (grey or black); transversely lined (with faint reddish-grey or dark 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 Rosa.
British representation. 2 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, Southern Scotland, Northern Scotland, Wales, and Ireland. Living adults found March and April, or April and May. A. badiata (Shoulder Stripe), A. derivata (The Streamer).
Illustrations. • A. badiata (Shoulder Stripe) and A. derivata (Streamer), with Epirrhoe, Costaconvexa, Camptogramma, Entephria, Larentia, Mesoleuca, Pelurga, Lampropteryx, Nebula, Cosmorhoe, Nebula: Newman 1869. • A. badiata, with other Larentiinae (‘Carpets’): Kirby 50. • A. derivata, with other Larentiinae (‘Carpets’, ‘Pugs’, etc.): Kirby 51.
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’.