Insects of Britain and Ireland: the genera of Lepidoptera-Geometridae
Lithina, Lozogramma, Ortholita.
Adults. Antennae of males dentate to simple (stout, flatly sub-dentate); shortly, evenly simply-ciliate.
Wingspan 31–37 mm. The outer margin of the forewing slightly sigmoid-curved, or convexly curved. Forewings light brownish-ochreous, the almost straight first and second lines whitish and anteriorly edged dark brown; with a clear discal mark (this dark fuscous). Forewings of the male without a fovea. The outer margin of the hindwings rounded to angled. Hindwings plain; whitish-ochreous; predominantly whitish to pale ochreous; without a clear discal mark; transversely lined (the pale, fuscous-edged lines more distinct towards the hind margin).
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 Pteridium aquilinum.
British representation. 1 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, Southern Scotland, Northern Scotland, Wales, and Ireland. Living adults found May and June. P. chlorosata (Brown Silver-line).
Illustrations. • Cepphis, Epione, Isturgia, Opisthograptis, Pachycnemia, Petrophora, Plagodis, Pseudopanthera: Newman. • 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’.