Fig 1. Trigonura sp.

Fig 2. Head - frontal view

Fig 3. Metasoma

Trigonura Sichel, 1866

Taxonomy

Hymenoptera: Chalcidoidea: Chalcididae: Chalcidinae

Diagnosis

Antennae attached at a little below the level of ventral margin of eye, anellus relatively shorter (Fig. 2).
Lower face regularly punctate.
Frons convex, without strong preorbital carinae.
Six gastral tergites visible before epipygium.
Hind femur without broad tooth.

Biology / Hosts

Members of this genus are parasites of wood boring beetles. Their hosts include Coleoptera: Curculionidae and Bostrychidae; Lepidoptera: Noctuidae.

Distribution

Canada, India and Southeast Africa.

References

• Herting, B. 1973. Coleoptera to Strepsiptera. A catalogue of parasites and predators of terrestrial arthropods. Section A. Host or Prey/Enemy. 3:17, 107,108 Commonwealth Agricultural Bureaux, Institute of Biological Control.
• Robert, A. 1961. The hymenopterous parasites of the elm weevils and their influence on their hosts in Quebec. Annals of the Entomological Society of Quebec 6:122-143.
• Thompson, W.R. 1955. A catalogue of the parasites and predators of insect pests. Section 2. Host parasite catalogue, Part 3. Hosts of the Hymenoptera (Calliceratid to Evaniid). pp. 201. Commonwealth Agricultural Bureaux, The Commonwealth Institute of Biological Control, Ottawa, Ontario, Canada.