| | Insects of Britain and Ireland: the genera of Lepidoptera-Noctuidae |
Adults. Head smooth. Eyes glabrous; not ciliated. Antennae of males ciliate.
Wingspan 29–36 mm. The thorax coloured like the forewings, the abdomen like the hindwings. Forewings faintly purplish, slate grey in the male, darker, purplish-fuscous to blackish in the smaller female; purplish marked or tinged; complexly patterned (with lines and short streaks); the patterning rather obscure; reniform defined; orbicular defined; claviform undefined. Hindwings whitish to whitish-fuscous, or fuscous; plain to 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. Thorax slightly crested (posteriorly). Middle tibiae without spines. Posterior tibiae without spines; with appressed scales. Abdomen not crested.
Living adults found August and September.
Larvae, pupae. Larvae feeding on grasses (exclusively).
British representation. 1 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, Southern Scotland, Northern Scotland, Wales, and Ireland (local); anomala (The Anomalous).
Amphipyrinae.
Illustrations. • Stilbia anomalata (The Anomalous): B. Ent. 631. • Stilbia anomalata: B. Ent. 631, legend+text. • Stilbia anomalata: B. Ent. 631, text cont.. • S. anomala (The Anomalous), and 14 related genera. 1, Panemeria tenebrata (Small Yellow Underwing); 2, Elaphria venustula (The Rosy Marbled); 3, Archanara geminipuncta (Twin-spotted Wainscot); 4(a) and (b), Archanara dissoluta (Brown-veined Wainscot); 5, Archanara algae ( Reed Wainscot); 6, Oria musculosa (Brighton Wainscot); 7, Rhizedra lutosa (Large Wainscot); 8(a)-(d), Charanyca trigrammica (Treble Lines); 9, Arenostola phragmitidis (Fen Wainscot); 10, Hoplodrina alsines (The Uncertain); 11, Hoplodrina blanda (The Rustic); 12, Caradrina morpheus (Mottled Rustic); 13, Caradrina clavipalpis (Pale Mottled Willow); 14(a)-(d), Chilodes peltigera (Silky Wainscot); 15, STILBIA anomala (The Anomalous); 16, Spodoptera exigua (Small Mottled Willow); 17, Acosmetia caliginosa (The Reddish Buff); 18, Coenobia rufa (Small Rufous); 19, Athetis pallustris (Marsh Moth). From Newman, 1869. • Amphipyrinae (Photedes, Stilbia, Apamea, Spodoptera): Kirby. AMPHIPYRINAE. 9, Photedes morrisii bondii (Morris's Wainscot); 10, Stilbia anomala (The Anomalous Moth); 21, Apamea difflua var. assimilis (Northern Arches); 22, Apamea zeta marmorata (The Exile); 23, Spodoptera littoralis (Mediterranean Brocade) From Kirby 52.
We advise against extracting comparative information from the descriptions. This is much more easily achieved using the DELTA data files or the interactive key, which allows access to the character list, illustrations, 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. See also Guidelines for using data taken from Web publications.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. Insects of Britain and Ireland: the genera of Lepidoptera-Noctuidae. Version: 14th February 2021. delta-intkey.com’.
