Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Adults. Crepuscular and nocturnal. Antennae of males bipectinate; apically simple. Face smooth.
Forewings 1.6–1.9 times as long as wide. The outer margin of the forewing convexly curved. Forewings not predominantly green, yellow, or black; green; without a clear discal mark. Hindwings conspicuously patterned to plain; green; predominantly green; without a clear discal mark; transversely lined (no first line, the second curved, white).
Vein 10 of the forewings arising out of vein 9. Hindwings exhibiting a tubular vein 5. Vein 5 of the hindwings arising from well above the middle of the transverse vein. Vein 8 of the hindwings shortly anastomosed basally with the upper margin of the cell, thence rapidly diverging. Hindwing veins 6 and 7 stalked.
Posterior tibiae of males 4-spurred.
Early stages. Larvae feeding on Clematis. Pupae above the ground (between leaves drawn together by silken strands).
British representation. 1 species; South-east England, Central-southern England, South-west England, and English Midlands (fairly common). Living adults found in July. H. chrysoprasaria (Small Emerald).
Illustrations. • Geometrinae: Newman (1869).
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’.