Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Adults. Crepuscular and nocturnal. Antennae of males bipectinate; apically simple.
Wingspan 42–54 mm. The outer margin of the forewing sigmoid-curved. Forewings pale green, with white costal edge and white-edged second and third lines, and a dull red apical spot in the cilia; without a clear discal mark; with a distinct median band (the band of a somewhat darker green). Forewings of the male without a fovea. The outer margin of the hindwings rounded to angled. Hindwings conspicuously patterned to plain; coloured green like the forewings; predominantly green when fresh; without a clear discal mark; transversely lined (with the white-edged, darker green second line only).
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 Betula, Quercus, Fagus, 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. Living adults found in July. C. margaritata (Light Emerald).
Illustrations. • Aleucis, Cabera, Campaea, Gnophos, Hylaea, Lomagrapha, Theria: Newman 1869. • Sterrhinae: Kirby 45.
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’.