The Diapriidae

gaster with 3 free tergites between petiole and spiracle-bearing tergite (Fig. 43, 44); all sutures between gastral terigtes complete, raching carinate margin of gaster (Fig. 44)

gaster with only 1 completely free tergite between petiole and spiracle-bearing tergite (Fig. 267, M147-150); at least some sutures between gastral tergites laterally effaced, not reaching carinate margin of gaster (Fig. 46) (part)