Revision of the Eurybrachidae IXX. The Australian genus Gelastopsis Kirkaldy, 1906: two new species, new records, biological data and key (Hemiptera: Fulgoromorpha)

Two new species of the Australian genus of Eurybrachidae (Hemiptera, Fulgoromorpha) Gelastopsis Kirkaldy, 1906 are described from northern Queensland: Gelastopsis croydonensis sp. nov. from Croydon, and Gelastopsis procyon sp. nov. from Fairview and Fairlight near Laura, and from Normanton. Both species were found on Acacia sp. (Fabaceae). Gelastopsis croydonensis sp. nov. was recorded in trophobiotic interaction with ants of the genus Camponotus (Hymenoptera: Formicidae), providing the first record of this kind for the genus. New records of the three previously described species of Gelastopsis are presented. The male terminalia of the new species are illustrated and photographs of collection and live specimens, distribution maps, biological data and an identification key are provided. The genus Gelastopsis currently contains five species.