1. Epiproct about as long as paraprocts, its apex acute, not emaginae; greatest witdth of prementum about 3/5 its length; paraprocts shorter than abdominal segments 9+10, each nearly straight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Boyeria grafiana
Epiproct distinctly shorter than paraprocts, it apex distinctly emarginate; gratest width of promentum about 2/3 its length; paraprocts longer than abdominal segments 9+10, each with apex distinctly recurved. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Boyeria vinosa