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

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L. Watson and M. J. Dallwitz

Ectropis Hübner

Tephrosia, including Paradarisa and Parectropis.

Adults. Crepuscular and nocturnal. Antennae of males with short, paired processes on either side of each joint, emitting fascicles of cilia; fasciculate-ciliate (with two short, acute, fasciculately ciliated processes on each side of each joint).

Wingspan 33–44 mm. The outer margin of the forewing convexly curved. Forewings whitish or whitish-fuscous, with numerous dark strigulae; with a clear discal mark, or without a clear discal mark. Forewings of the male with a fovea. The outer margin of the hindwings scalloped to smooth. Hindwings conspicuously patterned; coloured as forewings, with fewer and fainter transverse lines; with a clear discal mark to without a clear discal mark; transversely lined.

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 diverse deciduous trees, also Pinus.

British representation. 4 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, Southern Scotland, Northern Scotland, Wales, and Ireland. Living adults found March to June. E. crepuscularia (Small Engrailed, including E. bistortata (The Engrailed), E. consonaria (= Paradarisa, Square-spot), E. similaria (Brindled White-spot, = Parectropis).

Subfamily. Ennominae.

General comments. Parectropis (E. similaria) is distinguished by forewings with a white median subterminal spot, and Paradarisa (E. consonaria) has forewings with a distinct discal mark which is lacking in E. crepuscularia.

Illustrations. • Aethalura, Boarmia, Bupalus, Ectropis, Ematurga, Paradarisa, Serraca, Tephronia: Newman. • Ectropis crepuscularia (Small Engrailed: light and melanic, photos). • Larentiinae: Paradarisa consonaria: Brindled Square-spot, Square-spot: B. Ent. 280). • Paradarisa consonaria: B. Ent. 280, legend+text. • Paradarisa consonaria: B. Ent. 280, 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.’.