British Insects: the Families of Hymenoptera
British Insects: the Families of Hymenoptera |
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Gall Wasps.
Adults minute to small; 1–6 mm long (?).
Head. Antennae not geniculate.
Thorax. Pronotum long, extending back to the tegulae; not vertically grooved for reception of the fore femur. Cenchri absent. Fore-wings without a pterostigma; with very reduced venation; not combining greatly reduced venation with conspicuous stigmal vein; combining greatly reduced venation with a conspicuous radial cell. Closed fore-wing cells 2 (with a costal and a conspicuous radial cell). Submarginal cells 0. Discoidal cells 0. Hind femur with a clear trochantellus, or without a well defined trochantellus (?). Hind tibiae without specialised spurs.
Abdomen. The abdomen with a marked basal constriction; not extremely laterally compressed and knife-like (i.e., unlike Ibalia). Ovipositor of females not visibly protruding; adapted for piercing.
Larvae. Larvae with segmented legs; parasitic on hosts selected by the mother (commonly on Diptera).
General comments. The hind basitarsus less than twice as long as segments 2–5 combined, by contrast with Ibalia.
Classification. Species in Britain 32; genera 12 (with Aegilips, Anacharis and Figites encompassing the most species). Suborder Apocrita; Series Parasitica; Superfamily Cynipoidea.
Illustrations. • Aegilips, Anolytus, Xylaspis, Zygosis (Cameron III). • Aegilips, Anacharis, Anolytus, Callaspidia, Figites (Cameron III). • Figites, Lonchidia, Melanips, Sarothrus (Cameron III).
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. British insects: the families of Hymenoptera. Version: 18th September 2008. http://delta-intkey.com’.
