Key to species of the genus Proctotrupes in northern Iran

- Sides of pronotum without a median hairless area; radial vein moderately curved....................... .. ………. Proctotrupes brachypterus (Schrank, 1780)

- Sides of pronotum with a median hairless area, which is 0.5–0.7 as large as tegula; radial vein straight....... …….. ….. Proctotrupes gravidator (Linnaeus, 1758)