Genus Rugosimirax Ranjith & van Achterberg, 2023

Key to species of the genus Rugosimirax Ranjith & van Achterberg, 2023

1. Fourth flagellomere of antenna with acute spine apico-ventrally and penultimate flagellomere less than 2 × as long as wide; vein 1- R 1 as long as pterostigma ............................................................. 2

– Fourth flagellomere of antenna without acute spine apico-ventrally and penultimate flagellomere nearly 3× as long as wide; vein 1- R 1 distinctly shorter than pterostigma ........................................ 3

2. Propodeum with a longitudinal carina antero-medially; first flagellomere 5.2 × as long as wide; pterostigma brown .................................................... R. glabrator (Ranjith & van Achterberg, 2019)

– Propodeum smooth medially; first flagellomere 6.0 × as long as wide; pterostigma yellow ............. ..................................................................................... R. expectata Ranjith & van Achterberg, 2023

3. Hind depressions on scutellum hardly visible; frons clearly concave in front of anterior ocellus; T 2 long, at least 1.2 × as long as wide ................................................................ R. obsolescens sp. nov.

– Hind depressions on scutellum distinct, oblong-elliptical and close to each other with a carina separating them; frons flat in front of anterior ocellus; T 2 much wider, 1.8 × as wide as median length ................................................................................................................. R. bimacula sp. nov.