Key to the families and subfamilies of Cicadoidea

1 Pronotum greatly expanded and concealing majority of mesonotum ................................................................................................................. Tettigarctidae

—— Pronotum not expanded over mesonotum, much smaller than mesonotum ............................................................................................................. Cicadidae ..... 2

2 Metanotum entirely concealed at dorsal midline ........................................................... Cicadinae

—— Metanotum partly visible at dorsal midline ................................................................................... 3

3 Hind wing veins RP and M fused at their bases; supra-antennal plate usually (but not always) meeting or nearly meeting eye ................................... Cicadettinae

—— Hind wing veins RP and M unfused at their bases; distance between supra-antennal and eye about equal to length of antennal plate ................................. Tettigadinae