Key to the Papuan genera of Pachygastrinae with four scutellar spines

1 Flagellomeres 3–4 with slender lateral projections.......................................... Ptilocera Wiedemann

- Flagellomeres without slender lateral projections............................................................ 2

2 Vein R4+5 almost rectangularly bent at crossvein R-M.......................................... Acyrocera Lindner

- Vein R4+5 not rectangularly bent at crossvein R-M........................................................... 3

3 Last flagellomere long and densely haired and thus of cylindrical appearance or markedly flattened and ribbon-like................................................................................................ Rosapha Walker

- Last flagellomere arista like, almost bare or rarely short plumose................................................ 4

4 Arista densely short-haired, abdomen unusually long and slender, about 3.5-4.0 times as long as broad.... Parevaza James

- Arista at most short and sparsely haired, abdomen round or oval, rarely more clavate, at most twice as long as broad....... 5

5 Vein R2+3 arising before crossvein r-m.................................................... Glochinomyia Kertész

- Vein R2+3 arising distinctly beyond crossvein r-m.................................................. Evaza Walker