Insects of Britain and Ireland: the genera of Lepidoptera-Noctuidae
Adults. Head loosely scaled. Head with a frontal tuft. Eyes glabrous (?); not ciliated. Antennae of males ciliate. Labial palps very long; porrect.
Wingspan 15–21 mm. Forewings light brown; patterned transversely; the patterning well marked to obscure (rather plain to conspicuously transversely dark-lined and or light-banded); reniform defined to undefined; orbicular defined to undefined; claviform undefined (the stigmata missing or reduced to small, dark dots). Hindwings light grey, or whitish, or whitish-fuscous to fuscous; plain; without a clear discal mark; without transverse lines; exhibiting vein 5. Vein 5 of the hindwings strong; arising nearer to vein 4 than to vein 6; parallel with vein 4. Thorax not crested. Posterior tibiae with spines; with appressed scales. Abdomen (small-) crested.
Living adults found June to September.
Larvae, pupae. Larvae feeding on Thymus, and cannibalistic?.
British representation. 2 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, and Wales; costaestrigalis (Pinion-streaked Snout), taenialis (White-line Snout). S. intermedialis (Autumnal Snout) may be a very uncommon hybrid between the other two.
Illustrations. • S. taenialis (White-line Snout) and S. costaestrigalis (Pinion-streaked Snout), with Herminiinae, Hypeninae and Rivulinae: Leech, 1886. • S. taenialis (White-line Snout) and S. costaestrigalis (Pinion-streaked Snout), with other Hypeninae: 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. Insects of Britain and Ireland: the genera of Lepidoptera-Noctuidae. Version: 8th June 2016. delta-intkey.com’.