Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Codonia, Cosymbia, Ephyra, Leucophthalmia.
Adults. Crepuscular and nocturnal. Antennae of males bipectinate; apically simple. Face smooth.
Wingspan (22–)24–32(–34) mm. Forewings relatively narrow-elongate to relatively broad. The outer margin of the forewing convexly curved, or sigmoid-curved. Forewings whitish, greyish-whitish, yellowish whitish, or pale or reddish ochreous; with a clear discal mark, or without a clear discal mark. The discal mark when present, conspicuously pale-centred and dark-ringed (often), or not dark-ringed. Forewings with a distinct median band (this purplish or brown), or without a median band. The outer margin of the hindwings rounded, or rounded to angled. Hindwings conspicuously patterned (mostly), or plain; coloured like the forewings; not predominantly green, yellow, or black; with a clear discal mark, or without a clear discal mark. The discal mark when present, conspicuously pale-centred and dark-ringed. Hindwings transversely lined (mostly, sharply), or without transverse lines.
Vein 10 of the forewings arising out of vein 9. Hindwings exhibiting a tubular vein 5. Vein 5 of the hindwings arising from about 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 2-spurred (the females with all four spurs).
Early stages. Pupae above the ground (attached to a leaf by the tail, and sometimes with a silken girdle).
British representation. 7 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, Southern Scotland, Northern Scotland, Wales, and Ireland. Living adults found May and June, or August. C. pendularia (Dingy Mocha), C. albipunctata (Birch Mocha), C. annularia (Mocha), C. porata (False Mocha), C. punctaria (Maiden's Blush), C. linearia (Clay Triple-lines), C. puppillaria (Blairs Mocha).
General comments. Comparisons of Newman, Meyrick and Edelsten et al. with the Bradley et al. (1972) edition of Kloet and Hincks's check list reveal horrendous nomenclatural confusion over Timandra, Cyclophora, Colothysanis and Scopula; see especially the Blood-vein and the Maiden's Blush, for which identical nomenclatural combinations have been freely interchanged.
Illustrations. • 5 species, with other Sterrhinae: Kirby 45. • Sterrhinae: Newman (1869). • Cyclophora puppillaria (Blair's Mocha).
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’.