Key to families of Cercopoidea and tribes of Clastopterinae

1. Eyes appearing to touch base of wings, overlapping and concealing sides of pronotum; neotropical............ Epipygidae

- Eyes not reaching as far as base of wings, exposing lateral margins of pronotum (Fig. 1 F); world-wide................. 2

2. Antennae set in shallow pits, or on open area below prominent horizontal coronal margin.................... Cercopidae

- Antennae set in deep, narrow pits (Figs 19A–C) that may be directed dorsad (Fig. 25D); if coronal margin prominent and horizontal, then antennal pit deeply notching its rim and tightly embracing antennal base (Maa 1963, fig. 26G; Hamilton 2014, fig. 22B)................................................................................ Clastopteridae ......3.

3. Antennal ledges small, if extending downwards to middle of eye, then only about as thick as width of antennal pit (as in Cercopidae); ledge before antennae either glabrous or bearing numerous scattered setae......................Machaerotinae

- Antennal ledges large, extending downwards well below middle of eye, and at least twice as thick before antenna as antennal pit (Figs 6 A–L), bearing 1 isolated bristle on rim before antenna or 2–3 in a vertical row (Figs 19–20C)... Clastopterinae.....4

4. Tegmina with fracture-like folds across broad appendix (Figs 3–4 B); hind wing with 3 apical cells, the first small, confined to costal margin (Figs 3–4 C); male genital capsule exposed............................................ Clastopterini

- Tegmina without broad, folded appendix (Figs 8 A–H); hind wing with 4 apical cells of which the 3rd is much the longest; male genital capsule retracted into pregenital segment................................................ Sepulliini tr. nov.