British Insects: Pug moths (Lepidoptera-Geometridae)


L. Watson and M. J. Dallwitz

Eupithecia egenaria Herrich-Schäffer

Undosata Dietze.

Fletcher’s Pug, Pauper Pug.

Adults. Posterior tibiae of males 4-spurred. Wingspan 22–26 mm. Forewings distinctly elongate; the outer margin convexly curved; the costa more or less straight to arched; apically blunt.

Forewings relatively conspicuously patterned; brownish grey with variably distinct sinuous fuscous striae and a slightly darker submarginal band; ante- and postmedian lines double and curved rather than geniculate, veins partially marked blackish and sometimes whitish; the terminal line obscurely paler. Forewings with a dark discal mark. The discal mark elongate; not whitish-edged; black and distinct. Forewings with a pale tornal spot to without a tornal spot (this obscure). Forewing fringes conspicuously chequered to somewhat chequered.

Hindwings light brownish grey with only very faint darker striae, a fragmentary darker terminal line, and a scarcely paler postmedian fascia; less conspicuously patterned than the forewings; rather plain; almost without transverse striation; with a clear discal mark (this grey, inconspicuous), or without a clear discal mark; the fringes conspicuously chequered.

The abdomen conspicuously patterned to plain; with an entire black sub-basal band and with a pale basal band adjoining a dark sub-basal one.

Genitalia. The male abdominal plate in the form of a single sclerotized patch with a pair of apical extensions (elongate, the prongs small and narrow). The bursa copulatrix with ornamentation conspicuously restricted in distribution; conspicuously spiny (the bursa mostly smooth, with one or two longitudinal rows of spines).

Early stages, ecology. Botanically specialised. Foodplants woody-dicotyledonous; Tiliaceae. The larvae found on Tilia.

Months of appearance, distribution. Adults abroad in June. Central-southern England, South-west England, and English Midlands.

Special key characters. Forewings with double, smoothly curved ante- and postmedian lines predominant. Hindwings light brown, or brown, or pale fuscous, or pale grey.

General comments. Note that Meyrick’s description apparently confused E. egenaria with E. intricata subsp. arceuthata.

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.’.