Gnathochorisis Forster 1869

Key to the Indomalayan species of Gnathochorisis Förster, 1869

1. Second metasomal tergite as long as wide posteriorly; fore wing with closed areolet; area superomedia longer than wide; propodeum without anterior section of lateromedian longitudinal carinae; first flagellomere 5.3 × as long as wide; face, frontal orbits and pronotum yellow; body slender........................................................ G. malaisei Humala

– Second metasomal tergite clearly transverse (Fig. 2B); fore wing without areolet (Fig. 2C); area superomedia distinctly wider than long (Fig. 1F); propodeum with anterior section of lateromedian longitudinal carinae (Fig. 1F); first flagellomere 4.3–4.7 × as long as wide; face, frontal orbits and pronotum fuscous (Figs 1A, B, D); body more robust....................... 2

2. Area superomedia 1.25 × as wide as long; lower face smooth medially; clypeus 1.6 × as wide as high; hind femur 3.0 × as long as wide................................................................................. G. leleji Humala

– Area superomedia 1.8 × as wide as long (Fig. 1F); lower face transversely striate medially (Fig. 1B); clypeus 2.0 × as wide as high (Fig. 1B); hind femur 3.6 × as long as wide................................................ G. jasoni sp. nov.