British Insects: Pug moths (Lepidoptera-Geometridae)
Adults. Posterior tibiae of males 4-spurred. Wingspan 16–18 mm. Forewings not noticeably elongate; the outer margin convexly curved; the costa slightly arched; apically blunt.
Forewings pale grey, somewhat whitish mixed, usually with a dark geniculate median line, the postmedian fascia curved, with curved (not angulated) darker grey striae, and usually a prominent pale subterminal line, the fringe inconspicuously chequered. Forewings without a discal mark. Forewing fringes somewhat chequered.
Hindwings coloured like the forewings; patterned similarly to the forewings; fairly conspicuously patterned; faintly transversely striated; without a clear discal mark; without a pale tornal spot; the fringes not conspicuously chequered.
The abdomen suffused pale reddish towards the base; plain; neither ringed nor banded nor white-based; laterally neither black-streaked nor black-spotted.
Genitalia. The male abdominal plate in the form of two separate sclerotized components. The bursa copulatrix with ornamentation conspicuously restricted in distribution (longitudinally banded); conspicuously spiny to only inconspicuously spiny (the spines small).
Early stages, ecology. Botanically specialised. Foodplants a vine; Ranunculaceae. The larvae found on Clematis vitalba and garden Clematis; feeding on in flower buds.
Months of appearance, distribution. Adults abroad June and July; larvae found August and September. South-east England, Central-southern England, South-west England, English Midlands, Northern England, Wales, and Ireland.
Special key characters. Forewings not reddish-tinged. Hindwings not predominantly green, yellow, or black; pale grey.
General comments. Becoming scarce?.
Illustrations. • E. haworthiata (Haworth’s Pug), with larva: Barrett. • E. intricata arceuthata, E. intricata millieraria, E. plumbeolata, E. satyrata and E. haworthiata, with larvae: Barrett. • E. haworthiata (Haworth’s Pug), with similar Pugs: South. • E. haworthiata (Haworth’s Pug), with other Pugs: Swain. • E. haworthiata (Haworth’s Pug), with other Pugs. • E. haworthiata (Haworth’s Pug), with other Pugs: Newman.
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’.