The spittlebugs of the genus Euryaulax Kirkaldy 1906 (Hemiptera: Cercopoidea: Cercopidae) from Australia are revised to include six species: E. angustifasciatus sp. nov. (Western Australia and Northern Territory), E. arctofasciatus Lallemand, 1949 stat. rev. [reinstated from synonymy with E. carnifex (Fabricius, 1775)] (Northern Territory), E. carnifex (Fabricius, 1775) (Queensland, Northern Territory, Western Australia and New South Wales), E. kirkaldyi sp. nov. (Northern Territory), E. longiprocessus sp. nov. (Northern Territory and Western Australia), and E. vacuolus (Jacobi, 1928) (Queensland and Northern Territory). Descriptions or redescriptions of the genus and its included species with diagnostic characters are presented together with the dorsal habitus of the adults and structural illustrations of the head, pronotum, forewing, hindwing, and male genitalia. A diagnostic key is provided for identification of the known species in the genus.