gaster with 3 free tergites between petiole and spiracle-bearing tergite; all sutures between gastral tergites complete, reaching carinate margin of gaster (p. 44) (part)
Parabetyla
gaster with fewer than 3 free tergites between petiole and spiracle bearing tergite (Fig. 271, 273-275); at least some sutures between gastral tergites laterally effaced, not reaching carinate margin of gaster (p.52) (part)