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| Insects of Britain and Ireland: the families of Hymenoptera |
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).
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 Hymenoptera. Version: 14th April 2022. delta-intkey.com’.
