Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae

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L. Watson and M. J. Dallwitz

Boarmia Treitschke

Dryocoetis; = Hypomecis Hübner.

Adults. Relatively stout-bodied to slender-bodied. Antennae of males strongly bipectinate; apically simple. Face rough (with a short tuft of scales).

Wingspan 54–58 mm. The outer margin of the forewing convexly curved. Forewings whitish or whitish-fuscous, sprinkled fuscous and black, with conspicuous dark interrupted lines and marks; predominantly whitish, or pale fuscous; with a clear discal mark (this dark fuscous, before the median). The discal mark not dark-ringed. Forewings of the male with a fovea. Hindwings conspicuously patterned; coloured like the forewings; with a clear discal mark; transversely lined (these blackish, the conspicuous median wavy).

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.

Posterior tibiae of males 4-spurred.

Early stages. Larvae feeding on foliage of Quercus.

British representation. 1 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, and Wales (but uncommon). Living adults found in July. B. roboraria (Great Oak Beauty).

Subfamily. Ennominae.

Illustrations. • Aethalura, Boarmia, Bupalus, Ectropis, Ematurga, Serraca, Tephronia: Newman. • Ennominae: Kirby 48.

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.’.