Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Adults. Antennae of males simple; simply-ciliate. Face rough (with a short cone of scales).
Wingspan 26–40 mm. The outer margin of the forewing slightly sigmoid-curved, or convexly curved. Forewings ochreous to dark brown, or pale fuscous; predominantly ochreous, or brown, or pale fuscous; with a clear discal mark (this dark). The discal mark not dark-ringed. Forewings with a distinct median band to without a median band (the band darker, if distinguished). The outer margin of the hindwings scalloped. Hindwings conspicuously patterned (P. transversata), or plain (P. vetulata); coloured similarly to the forewings; with a clear discal mark, or without a clear discal mark; transversely lined (these faint in P. vetulata).
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 Rhamnus.
British representation. 2 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, and Wales. Living adults found June and July. P. transversata (Dark Umber), P. vetulata (Brown Scallop).
General comments. The abdomen of males with very large, exserted genital claspers.
Illustrations. • P. transversata (Dark Umber) and P. vetulata (Brown Scallop), with Euphyia, Pareulype, Rheumaptera, Triphosa: Newman 1869. • P. transversata and P. vetulata, with other Larentiinae: Kirby 49.
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’.