Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Adults. Crepuscular and nocturnal (the females tending to fly later than the males). Antennae of males bipectinate; apically simple. Face smooth.
Wingspan 42–56 mm. The outer margin of the forewing slightly sigmoid-curved, or convexly curved. Forewings typically orange in the male, yellow in the female, but sometimes extensively brown over the basal and outer thirds; with a clear discal mark (this dark); with a distinct median band (the band orange or yellow), or without a median band. Forewings of the male without a fovea. The outer margin of the hindwings scalloped to smooth. Hindwings conspicuously patterned (dark-speckled or brown with an orange median fascia in males, sometimes yellow with a broad brown margin in females), or plain (in typical females); typically orange in the male and yellow in the female, but sometimes extensively brown over the outer third; predominantly yellow, or orange, or brown; with a clear discal mark, or without a clear discal mark; without transverse lines.
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.
Thorax smooth. Posterior tibiae of males 4-spurred.
Early stages. Larvae feeding on foliage of Salix, Prunus, etc.
British representation. 1 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, Southern Scotland, Wales, and Ireland. Living adults found June and July. A. prunaria (Orange Moth).
Illustrations. • Angerona prunaria (Orange Moth: colour variants, photos). • Ennominae (‘Thorns’, etc.): Kirby 46. • ‘Thorns’ - Angerona, Apeira, Colotois, Crocallis, Ennomos, Odontopera, Selenia: Newman.
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’.