Insects of Britain and Ireland: the genera of Lepidoptera-Noctuidae

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L. Watson and M. J. Dallwitz

Tyta Billberg

Dysthymia Newman.

Adults. Head loosely scaled. Eyes glabrous; not ciliated. Antennae of males ciliate. Labial palps medium; ascending.

Wingspan 25–29 mm. Forewings blackish or dark fuscous; rosy marked or tinged, or neither purplish nor rosy marked or tinged; complexly patterned; the patterning well marked (only slightly marbled for the most part, but with a conspicuous white or rosy post-median fascia adjoining the costa, small pale spots subterminally, and pale blotching at the inner angle); reniform undefined (subsumed in a white or rosy fascia); orbicular undefined; claviform undefined. Hindwings dark fuscous and yellowish, or blackish; conspicuously patterned (fuscous, with a whitish median band expanding to a whitish mark in the marginal dark band near the inner angle); transversely lined (there being a light line in the marginal band); exhibiting vein 5. Vein 5 of the hindwings strong; arising nearer to vein 4 than to vein 6. Thorax slightly crested (posteriorly). Middle tibiae without spines. Posterior tibiae with spines; with appressed scales. Abdomen crested to not crested (with no more than a small basal crest).

Living adults found May, June, and August.

Larvae, pupae. Larvae feeding on Convolvulus, eating unexpanded flower buds, nocturnally; pupating on the surface of the ground, or in the soil.

British representation. 1 species; South-east England, Central-southern England, South-west England, and English Midlands; luctuosa (The Four-spotted).

Ophiderinae.

Illustrations. • Tyta luctuosa (The Four-spotted), and other Ophiderinae: Newman. • British Ophiderinae: Swain. • Ophiderinae: Kirby.


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’.

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