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

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L. Watson and M. J. Dallwitz

Xanthorhoe Hübner

Coremia, Malenydris, Ochyria.

Adults. Antennae of males bipectinate; usually apically simple. Face rough.

Wingspan 24–34 mm. The outer margin of the forewing convexly curved, or sigmoid-curved. Forewings not predominantly green, yellow, or black; whitish, greyish, greyish-ochreous, or reddish-ochreous; with a clear discal mark (this dark fuscous or black); nearly always with a distinct median band (this dark, sometimes incomplete or lighter towards the hind margin). Hindwings plain; whitish, greyish-whitish, grey, fuscous, pale ochreous, etc.; with a clear discal mark, or without a clear discal mark; transversely lined.

Vein 10 of the forewings arising independently of 9; arising independently, anastomosing with 11 and 9 to form a double 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 diverse Dicot herbs, especialy Cruciferae, and X. montanata also on grasses.

British representation. 8 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 to August (sometimes double brooded). X. biriviata (Balsam Carpet), X. designata (Flame Carpet), X. ferrugata (Dark-barred Twin-spot Carpet), X. fluctuata (Garden Carpet), X. montanata (Silver-ground Carpet), X. decoloraria (Red Carpet), X. spadicearia (Red Twin-spot Carpet), X. quadrifasiata (Large Twin-spot Carpet).

Subfamily. Larentiinae.

Illustrations. • 6 species, with Lythria, Phibalapteryx, Orthonama and Catarhoe: Newman (1869). • 7 Xanthorhoe species, with other Larentiinae (‘Carpets’): Kirby 50.

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.’.