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

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L. Watson and M. J. Dallwitz

Coenobia Stephens

Adults. Head with a projecting, triangular horny frontal plate (concealed in dense scales). Eyes glabrous; not ciliated. Antennae of males ciliate.

Wingspan 22–25 mm. Head and thorax coloured like the forewings, abdomen similar or lighter like the hindwings. Forewings light or dark reddish brown; plain, or patterned transversely, or longitudinally streaked; the patterning obscure (plain, save for an indistinct darker basal streak and sometimes an indistinct outer line of dots); reniform undefined; orbicular undefined; claviform undefined. Hindwings white, or whitish, or whitish-fuscous, or fuscous, or grey; plain; without a clear discal mark; transversely lined (faint), or without transverse lines; exhibiting vein 5. Vein 5 of the hindwings weak; arising nearer to vein 6 than to vein 4. Thorax slightly crested (anteriorly). Middle tibiae without spines. Posterior tibiae without spines; with appressed scales. Abdomen not crested.

Living adults found in July.

Larvae, pupae. Larvae feeding on Juncus, in the stems.

British representation. 1 species; South-east England, Central-southern England, South-west England, English Midlands, Wales, and Ireland (local, in damp places); rufa (Small Rufous).


Illustrations. • C. ruga (Small rufous), and related genera: 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. Insects of Britain and Ireland: the genera of Lepidoptera-Noctuidae. Version: 8th June 2016.’.