Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Psodos, Psoidos, Psolos.
Adults. Diurnal. Antennae of males simple (stout); shortly simply-ciliate. Face rough (with long, rough hairs).
Wingspan 25–27 mm. The outer margin of the forewing convexly curved. Forewings dark grey, with blackish basal fascia and transverse banding; predominantly grey, or blackish; with a clear discal mark (this black). Forewings of the male without a fovea. Hindwings conspicuously patterned (the blackish basal fascia and broad median and marginal bands contrasting with the grey background); coloured like the forewings; predominantly grey, or blackish; without a clear discal mark; transversely lined.
Forewings lacking vein 10. 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 mosses?. Pupae on the surface of the ground (without a cocoon).
British representation. 1 species; Southern Scotland and Northern Scotland (montane). Living adults found in July. G. coracina (Black Mountain Moth), Psodos quadrifaria.
Illustrations. • Aspitates, Dyscia, Glacies, Perconia, Siona: Newman. • Psodos equestrata Fab. (Gold Four-spot Moth: B. Ent. 424). • Psodos equestrata Fab.: B. Ent. 424, legend+text. • Psodos equestrata Fab.: B. Ent. 424, text cont.. • Ennominae: Kirby 48.
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’.