British Insects: the Families of Hymenoptera
British Insects: the Families of Hymenoptera |
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Adults minute to small; 0.7–6.5 mm long.
Head. Antennal segments 7–8, or 11–12. Antennae geniculate.
Thorax. Pronotum long, extending back to the tegulae; vertically grooved to receive the fore femur. Cenchri absent. Wings present, or absent (e.g., Trimorus procris). Fore-wings when present, without a pterostigma; with very reduced venation (with distinct, though sometimes short, marginal and stigmal veins); combining greatly reduced venation with a conspicuous, blind-ending stigmal vein (though this is sometimes short). Closed fore-wing cells 0, or 1 (the costal). Submarginal cells 0. Discoidal cells 0. Hind-wings without closed cells. Mid and hind tibiae with one spur only. Hind femur without a well defined trochantellus. Hind tibiae without specialised spurs.
Abdomen. The abdomen 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 eggs of Lepidoptera, Hemiptera, Orthoptera and occasionally Arachnids).
British representation. Species in Britain about 110; Allophanurus, Baeus, Gryon, Opisthacantha, Plesiobaeus, Scelio, Sparasion, Teleas, Telenomus, Thoron, Trimorus, Trisacantha, Trissolcus, Xenomerus (with numerous species in Telenomus and Trimorus).
Classification. Suborder Apocrita; Series Parasitica; Superfamily Proctotrupoidea.
Illustrations. • Sparasion frontalis (B. Ent. 317). • Sparasion frontalis (detail: B. Ent. 317). • Sparasion frontalis (dissections: B. Ent. 317). • Sparasion frontalis: B. Ent. 317, legend+text. • Sparasion frontalis: B. Ent. 317, text cont.. • Scelio rugulosus: B. Ent. 325. • Scelio rugulosus: B. Ent. 325, legend+text. • Scelio rugulosus: B. Ent. 325, text cont.. • Trimorus elatior: B. Ent. 333. • Trimorus elatior: B. Ent. 333, legend+text. • Trimorus elatior: B. Ent. 333, text cont.. • Trimorus procris (apterus): as Teleas procris, Stephens 1846.
To view the illustrations with captions giving names in current use, 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, distributions of character states within any set of taxa, source references, and other relevant material.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. British insects: the families of Hymenoptera. Version: 28th August 2009. http://delta-intkey.com’.
