Insects of Britain and Ireland: the families of Coleoptera
General appearance. Beetles not luminescent.
Detailed morphology. Labrum mostly membranous or only very lightly sclerotized. Antennae very short (females); filiform (moniliform, females).
The pronotum without lateral keels. Scutellum highly reduced. The fore-leg coxae attached externally, in the absence of procoxal cavities. The mid-leg coxae attached externally, in the absence of mesocoxal cavities. Hind-leg coxae widely separated; not markedly extended laterally. The penultimate segment distinctly shorter than the antepenultimate one.
Elytra absent (females). Wings absent or much reduced (females). Abdominal sternites 9 (females).
Illustrations. • Drilus flavescens, male and female (with unrelated taxa): Fowler 4, 116 (1890). • Fowler 4, 116 (1890): original legend.. • Drilus flavescens (Rye & Fowler).
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 families of Coleoptera. Version: 16th May 2016. delta-intkey.com’.