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

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L. Watson and M. J. Dallwitz

Diarsia Hübner

Adults. Head rough. Face without any conspicuous prominence. Eyes glabrous; not ciliated. Antennae of males ciliate.

Wingspan 28–45 mm. Head and thorax coloured like the forewings the abdomen usually paler like the hindwings but sometimes terminally rufous-tufted. Forewings variously light to dark or reddish browns (sometimes purple-tinged), ochreous, or ochreous-grey; pale ochreous, or ochreous, or purple, purplish, red, pinkish or rosy, or light brown, or brown, or pale fuscous, or pale grey, or grey, or reddish brown; neither green nor greenish tinged; purplish marked or tinged, or neither purplish nor rosy marked or tinged; patterned transversely, or complexly patterned; the patterning well marked, or obscure; reniform defined; orbicular defined. Hindwings whitish-fuscous, or fuscous, or grey; plain, or terminally darkened; with a clear discal mark, or without a clear discal mark; without transverse lines; exhibiting vein 5. Vein 5 of the hindwings strong (distally); arising nearer to vein 6 than to vein 4. Thorax crested (front and rear). Middle tibiae with spines. Posterior tibiae with spines. Abdomen not crested.

Living adults found May to July, or August.

Larvae, pupae. Larvae feeding on diverse Dicot herbs and shrubs; pupating on the surface of the ground.

British representation. 6 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, Southern Scotland, Northern Scotland, Wales, and Ireland; brunnea (Purple Clay), dahlii (Barred Chestnut), florida (Fen Square Spot, = rubi?), mendica (Ingrailed Clay), rubi (Small Square Spot).


Illustrations. • Noctuinae: 4 Diarsia species with related genera: Newman. • Diarsia mendica (Ingrailed Clay, light and dark forms: photos). • Noctuinae: 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.’.