Insects of Britain and Ireland: the families of Hymenoptera

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L. Watson and M. J. Dallwitz


Adults small.

Head. Antennal segments 14 (males), or 15 (females). Antennae not geniculate.

Thorax. Pronotum long, extending back to the tegulae; vertically grooved to receive the fore femur. The spiracle cover lobe of the pronotum not margined with close fine hairs. Cenchri absent. Wings present. Fore-wings with a conspicuous pterostigma, or without a pterostigma; more or less with the venation well developed; not combining greatly reduced venation with conspicuous stigmal vein; not combining greatly reduced venation with a conspicuous radial cell. Closed fore-wing cells 2, or 3. Hind-wings with closed cells, or without closed cells. Hind femur without a well defined trochantellus. Hind tibiae without specialised spurs.

Abdomen. The abdomen broadly sessile at its base, without a marked constriction to with a marked basal constriction. The ‘waist’ simple. Ovipositor of females not visibly protruding; adapted for piercing.

Larvae. Larvae legless or the legs vestigial; parasitic on hosts selected by the mother (on hosts from various Orders, including other Hymenoptera, Coleoptera and Neuroptera).

British representation. Species in Britain 3; Helorus.

Classification. Suborder Apocrita; Series Parasitica; Superfamily Proctotrupoidea.

Illustrations. • Helorus anomalipes (B. Ent. 403). • Helorus anomalipes (detail: B. Ent. 403). • Helorus anomalipes (dissections: B. Ent. 403). • Helorus anomalipes (B. Ent. 403, legend+text). • Helorus anomalipes (text, cont.: B. Ent. 403).

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 Hymenoptera. Version: 16th May 2016.’.