Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Adults. Antennae of males simple; shortly simply-ciliate. Face smooth.
Wingspan 24–28 mm. Forewings light grey or whitish, dusted fuscous, with dark striae and an ochreous-orange-ish fascia near the apex; predominantly whitish, or pale grey; with a clear discal mark (this blackish). The outer margin of the hindwings smooth. Hindwings plain; light grey or whitish, dusted fuscous; without a clear discal mark; transversely lined (with dark striae).
Vein 10 of the forewings arising independently of 9; arising out of 11 and anastomosing with 9 to form a simple areole. Hindwings exhibiting a tubular vein 5. Vein 5 of the hindwings arising from about the middle of the transverse vein, or arising from below the middle of the transverse vein (?). 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 stalked.
Posterior tibiae of males 4-spurred.
Early stages. Larvae feeding on Ulmus.
British representation. 1 species; South-east England, South-west England, English Midlands, and Northern England. Living adults found June and July. D. blomeri (Blomer's Rivulet).
Illustrations. • Larentiinae: Discoloxia blomeri (Curtis): Blomer's Rivulet, B. Ent. 416. • Discoloxia blomeri: B. Ent. 416, legend+text. • Discoloxia blomeri: B. Ent. 416, text cont.. • Acasis, Aplocera, Asthena, Carsia, Chesias, Discoloxia, Euchoeca, Hydrelia, Lithostege, Lobophora, Minoa, Odezia, Pterapherapteryx, Trichopteryx: 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’.