Couplet 7.
gaster with only 4 clearly defined segments posterior to the large tergite; petiole at apex beneath without suck a pencil of hairs; flagellum 1 without trace of a basal modification amd evenly hairy all round. (radial cell completely closed)
gaster with 6 clearly segments posterior to the large tergite; petiole beneath without such a pencil of hairs; flagellum with at least a straight-edged basal modification from which, in profile, no hairs arise
future couplets
Side of scutellum with a free, hook... ...
Oxylabis
Side of scutellum without a free pr... ...
Belyta Jurine
Radial cell completely closed at ap... ...
Paroxylabis Kieffer