| | Insects of Britain and Ireland: the families of Trichoptera (caddis flies) |
Adults. Adults quite small to minute; black. Antennae about as long as the fore-wings; fairly stout; with an elongated first segment. Ocelli absent. Maxillary palps 5 segmented; the terminal segment inflexible, not multi-articulated, not annulated, and not much elongated. The scutellum exhibiting a pair of warts.
The fore-wings 4–6 mm long; without a median cell; without a discoidal cell; apical forks not reliably interpretable, the neuration being “unstable and irregular”. The hind-wings narrower than the fore-wings to similar in width to the fore-wings; without a discoidal cell; apical forks not safely interpretable.
Front tibia 2 spurred. Middle tibia 2 spurred. Hind tibia 4 spurred.
Larvae. The larvae constructing and living in transportable cases; eruciform. The right mandible exibiting a brush of hairs on its inner (concave) surface. The thorax without a prosternal horn. The mesonotum sclerotized; divided longitudinally into two sclerites. The metanotum entirely membranous; bearing brushes of bristles. The metasternum with no more than a median pair of bristles. Abdominal segment 1 with retractable papillae; 8 with a lateral comb of fine spicules. The larva with the terminal abdominal prolegs fused basally, forming an ostensible tenth segment.
Comments. The hind tarsal claw of the larva elongated, as long as the tarsus.
British representation. 4 species. Genera: Beraea, Bereodes, Ernodes.
Illustrations. • Beraea, Ernodes, Bereodes: wing venation. 1a and 1b, Beraea pullata; 2a and 2b, Ernodes articularis; 3a and 3b, Bereodes minuta. a=male, b=female. From Mosely (1939).
We advise against extracting comparative information from the descriptions. This is much more easily achieved using the DELTA data files or the interactive key, which allows access to the character list, illustrations, 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. See also Guidelines for using data taken from Web publications.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. Insects of Britain and Ireland: the families of Trichoptera (caddis flies). Version: 27th July 2019. delta-intkey.com’.
