British Insects: Pug moths (Lepidoptera-Geometridae)
E. tenuiaria Doubleday.
Adults. Posterior tibiae of males 4-spurred. Wingspan 17–19 mm. Forewings not noticeably elongate; the outer margin convexly curved; the costa arched; apically blunt.
Forewings light greyish-ochreous, with numerous curved rather dark fuscous striae, the veins and costa ochreous-brown and the edges of the biangulate obscure median band forming dark costal spots; the subterminal line scarcely paler, very inconspicuous, the fringe fairly conspicuously chequered. Forewings with a dark discal mark. The discal mark dot-like (ovoid and conspicuous); not whitish-edged; black and distinct. Forewings without a tornal spot. Forewing fringes conspicuously chequered to somewhat chequered.
Hindwings whitish grey with dark striae, the marking stronger posteriorly and post-medianly; less conspicuously patterned than the forewings; conspicuously patterned; transversely striated (similarly to the forewings, with a curved postmedian fascia); with a clear discal mark (this small, dark grey), or without a clear discal mark; the fringes fairly conspicuously chequered.
The abdomen with the margins mixed black and white.
Genitalia. The male abdominal plate in the form of two separate sclerotized components. The bursa copulatrix ornamented over most of its surface; only inconspicuously spiny.
Early stages, ecology. Botanically specialised. Foodplants woody-dicotyledonous; Salicaceae. The larvae found on Salix; feeding on male and female catkins.
Months of appearance, distribution. Adults abroad June and July (single-brooded); larvae found March and April. South-east England, Central-southern England, South-west England, English Midlands, Northern England, Southern Scotland, Northern Scotland, Wales, and Ireland (widespread and often common, local in Ireland).
Special key characters. Forewings with ochreous-brown veins and costa. Hindwings white and pale fuscous, or pale grey.
Illustrations. • E. tenuiata (Slender Pug), with larva: Barrett. • E. denotata jaseoneata, E. tenuiata, E. inturbata, E. dodoneata and E. abbreviata, with larvae. Barrett. • E. tenuiata (Slender Pug), with similar Pugs: South. • E. tenuiata (Slender Pug), with other Pugs: Swain.
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. British insects: Pug moths (Lepidoptera-Geometridae). Version: 29th December 2011. http://delta-intkey.com’.