Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Hibernia, Hybernia, Lampetia.
Adults. Crepuscular to nocturnal; with fully developed wings, or flightless. The flightless females apterous (the body light grey with contrasty black markings). Antennae of males shortly bipectinate (the short pectinations fasciculate-ciliate); apically simple; fasciculate-ciliate. Face rough (haired). Tongue fully developed, or absent (?).
Wingspan 40–45 mm. The outer margin of the forewing convexly curved to more or less straight. Forewings whitish-ochreous, strigulated dark fuscous, with reddish-ochreous, ferrugineous, darkly fuscous or purplish-fuscous basal and post-median bands; or dark ochreous to ferrugineous, darkly speckled and/or strigulated; predominantly pale ochreous, or ochreous, or light brown; without a transparent discal scar; with a clear discal mark (usually, this blackish), or without a clear discal mark. Forewings of the male without a fovea. Hindwings somewhat conspicuously patterned to plain; whitish-ochreous, sprinkled grey; with a clear discal mark (this dark); transversely lined to without transverse lines.
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.
Thorax crested. Posterior tibiae of males 4-spurred.
The abdomen conspicuously patterned (grey with black spots, in the female), or plain (in the male).
Early stages. Larvae feeding on foliage of diverse deciduous trees and shrubs.
British representation. 1 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, Southern Scotland, Northern Scotland, Wales, and Ireland. Living adults found October to December. E. defoliaria (Mottled Umber).
Illustrations. • Erannis defoliaria (Mottled Umber: variation in males, photos). • Erannis defoliaria (Mottled Umber): B. Ent. 703. • Erannis defoliaria: B. Ent. 703, legend+text. • Erannis defoliaria: B. Ent. 703, text cont.. • Agriopis, Alsophila, Apocheima, Phigalia, Erannis, Lycia: Newman. • Oenochrominae and Ennominae: Kirby 47. • Larentiinae: Phigalia, (Pale Brindled Beauty), Erannis (Mottled Umber, Scarce Umber, Spring Usher, Dotted Border).
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’.