The Diapriidae

Side of scutellum with a free, hook-like projection; large sternite with a raised, transverse margin at base; scutellum usually with a spinose projection; marginalis at least two-thirds as long as its distance from the basalis; front tibia without modified bristles.

Side of scutellum without a free projection; large sternite without a raised, transverse margin; scutellum without a spinose projection; marginalis about half as long as its distance from the basalis; front tibia with a short row of differentiated bristles