Kwik-Key to Common Families of Hymenoptera

Select "A" or "B" for your specimen:

A.   Does the front wing have two recurrent veins (arrows)?  Is there a single large cell beneath the stigma (pink) that resembles a horsehead?

A

B.   Does the front wing have only one recurrent vein (arrow)?   Is the cell beneath the stigma small and roughly trapezoidal?

B