Insects of Britain and Ireland: the genera of Lepidoptera-Noctuidae
Plastenis Boisduval, Zenobia Agassiz, Zenobia Oken.
Adults. Head rough. Head without a projecting, horny frontal plate. Eyes glabrous; not ciliated. Antennae of males ciliate. Labial palps medium to long.
Wingspan 26–34 mm. Head, thorax and abdomen coloured like the forewings, or somewhat paler. Forewings olive grey-brown; greenish, or pale fuscous, or fuscous, or olive brown; patterned transversely (lined and barred); the patterning well marked to obscure; patterned lighter, or lighter and darker; reniform defined; orbicular defined (the stigmata pale-outlined); claviform undefined. Hindwings fuscous; plain, or terminally darkened; without a clear discal mark; without transverse lines; exhibiting vein 5. Vein 5 of the hindwings weak; arising nearer to vein 6 than to vein 4. Middle tibiae without spines. Posterior tibiae without spines; rough-scaled. Abdomen not crested.
Living adults found July to September.
Larvae, pupae. Larvae posteriorly rounded; feeding on Salicaceae, drawing together leaves to form a retreat; pupating on the surface of the ground.
British representation. 2 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, Southern Scotland, Wales, and Ireland; retusa (Double Kidney), subtusa (The Olive).
Illustrations. • I. retusa (The Small Olive) and I. subtusa (The Olive), with 8 related genera: Newman. • Amphipyrinae: Kirby 36 (part) and 38 (part).
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’.