Insects of Britain and Ireland: the families of Hymenoptera

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L. Watson and M. J. Dallwitz


Adults small to large; 7–20 mm long.

Head. Antennal segments 13 (males), or 14 (females).

Thorax. Pronotum long, extending back to the tegulae. The spiracle cover lobe of the pronotum margined with close fine hairs. Cenchri absent. Fore-wings with a conspicuous pterostigma; with the venation well developed. Hind-wings without closed cells. Hind-wings without an anal lobe. Hind femur with a clear trochantellus. Hind tibiae without specialised spurs.

Abdomen. The abdomen with a marked basal constriction. The gaster with the first two segments fused; attached high on the propodeum. Ovipositor of females visibly protruding (long); adapted for piercing.

Larvae. Larvae with segmented legs; parasitic on hosts selected by the mother (on wood-boring Coleoptera and Symphyta).

British representation. Species in Britain 1; Aulacus.

Classification. Suborder Apocrita; Series Parasitica; Superfamily Evanioidea.

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Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. Insects of Britain and Ireland: the families of Hymenoptera. Version: 16th May 2016.’.