4. Gonoforceps without groove paralleling inner edge (FIGURE). T3-6 moderately concave apically and without median longitudinal submembranous area (FIGURE).

4’. Gonoforceps with strong setiferous groove close to and paralleling apical 0.7 of ventral inner edge (FIGURE). T3-6 strongly concave apically and with median apical or subapical longitudinal submembranous area (FIGURE). [Note: ‘These generic characters hold for normal males, but dwarf males do not have them developed and will key to the genus Rhyssella.’ (Townes & Townes, 1960: 395)]