Megastigmus viggianii Narendran

Hymenoptera: Chalcidoidea: Torymidae: Megastigminae

Female: Body more or less uniform yellowish-orange, except ovipositor and ovipositor sheath darker brown, all pairs of legs light yellow. Lower clypeal margin not incised or bilobed in the middle. Frenum nearly smooth. Antenna with anellus shorter than half of pedicel, F1 longer than F2. Postocellar distance nearly twice ocelloocular distance. Ovipositor twice as long as abdomen. Forewing with basal vein distinct.

Male: Similar to female except for darker bands on abdomen.

   Female - dorsal view
  Male - dorsal view

India: Karnataka; Kerala.

Most species of Megastigmus are phytophagous and form galls, but a few species are known to be parasitic on other gall formers. This species is associated with galls formed by the eucalyptus gall wasp, Leptocybe invasa Fisher & La Salle. Another species, M. dharwadicus Narendran and Vastrad, has also been recorded as an important parasitoid of L. invasa in some parts of Karnataka.