| 1a. Vein R1 of forewing curved anteriorly just past origin. | |
| 1b. Vein R1 of forewing straight or flat at origin. | |
| 2a. Epiproct forked, with one process over other in same plane. | |
| 2b. Epiproct not forked | |
| 3a. Cerci with less than (<) 11 segments. | |
| 3b. Cerci with more than (>) 11 segments. |
Good LinksOn this website:Key to Capnia Males Key to Capnia Nymphs |