Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Adults. Diurnal. Antennae of males dentate to simple (stout, flatly sub-dentate); shortly, evenly simply-ciliate.
Wingspan 39–52 mm. The outer margin of the forewing convexly curved. Forewings white to pale ochreous-white, with grey veins; without a clear discal mark. Forewings of the male without a fovea. Hindwings plain; coloured and veined like the forewings; without a clear discal mark; without transverse lines.
Hindwings lacking a tubular vein 5. Vein 8 of the hindwings approximated to or anastomosed with the upper margin of the cell to the middle or beyond. Hindwing veins 6 and 7 separate.
Posterior tibiae of males 4-spurred.
Early stages. Larvae feeding on grasses, e.g. Brachypodium.
British representation. 1 species; South-east England, Central-southern England, South-west England, and Ireland (local). Living adults found in June. S. lineata (Black Veined Moth).
Illustrations. • Siona lineata (Black-veined Moth): B. Ent. 691. • Siona lineata: B. Ent. 691, legend+text. • Siona lineata: B. Ent. 691, text cont.. • Aspitates, Dyscia, Glacies, Perconia, Siona: Newman. • Ennominae: Aspitates, Semiothisa, Perconia, Siona (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-Geometridae. Version: 8th June 2016. delta-intkey.com’.