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

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L. Watson and M. J. Dallwitz

Dyscia Hübner

Maesia, Moesia, Scodiona.

Adults. Antennae of males bipectinate; bipectinate to the apex. Face smooth. Tongue fully developed.

Wingspan 33–40 mm. The outer margin of the forewing convexly curved. Forewings light to dark greyish ochreous, sprinkled dark fuscous, with a fuscous postmedian transverse bar and another near the base, and a dark discal spot; predominantly fuscous, or pale fuscous, or pale grey; with a clear discal mark. The discal mark conspicuously pale-centred and dark-ringed, or not dark-ringed. Forewings of the male without a fovea. Hindwings conspicuously patterned to plain; coloured like the forewings; with a clear discal mark; transversely lined (the first line absent, a dark postmedian one present).

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 Erica, Calluna.

British representation. 1 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, Southern Scotland, Northern Scotland, Wales, and Ireland (local). Living adults found in June. D. fagaria (Grey Scalloped Bar).

Subfamily. Ennominae.

Illustrations. • Larentiinae: Dyscia fagaria (Grey Scalloped Bar: B. Ent. 33). • Dyscia fagaria: B. Ent. 33, legend+text. • Dyscia fagaria: B. Ent. 33, text cont.. • Aspitates, Dyscia, Glacies, Perconia, Siona: 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.’.