The Australian planthopper tribe Eucarpiini is revised taxonomically. Five genera are recognised in the Australia fauna: Bajauana Distant 1907, Dilacreon Fennah, 1980, Kirbyana Distant, 1906, Neocarpia Tsaur & Hsu, 2003 and Nesochlamys Kirkaldy, 1907. Except for Bajauana all of these represent new records for Australia. Eucarpia Walker, 1857 is declared absent from Australia. Twelve species, nine of which are new, are recognised in the Australian fauna: Bajauana acuminata, sp. nov., Dilacreon akethe, sp. nov., D. ispi, sp. nov., Neocarpia rhizophorae, sp. nov., Nesochlamys capensis, sp. nov., N. contrarius, sp. nov., N. jubatus, sp. nov., N. pandikros, sp. nov. and N. yiralli, sp. nov. Except for Bajauana austrina (Kirkaldy, 1907) and D. (D.) granulinervis, all species are endemic to Australia. Lectotypes are designated for Australoma austrina Kirkaldy, 1907, Ptoleria australis Muir, 1913 and P. granulinervis Muir, 1913. New combinations proposed are: Dilacreon (Dilacreon) granulinervis (Muir, 1913) comb. nov. (from Eucarpia), Kirbyana australis (Muir, 1913) comb. nov. (from Eucarpia) and Leptolamia praetextata comb. nov. (from Bajauana, transfer from Eucarpiini to Cixiini). All Australian species of Eucarpiini are described and illustrated and identification keys to genera and species are provided.

As part of the ongoing revision of the Australian Cixiidae, here we revise the endemic genus Chidaea Emeljanov, 2000. Examination of the holotype of Cixius sidnicus Stål, 1859 revealed that it is not congeneric with Cixius nervosus (Linnaeus, 1758) but belongs to the hitherto monotypic genus Chidaea resulting in the new combination Chidaea sidnicus (Stål, 1859). Chidaea dayi Emeljanov, 2000 is redescribed and thirteen new species are described: Chidaea algida sp. nov., Ch. armidalensis sp. nov., Ch. belairensis sp. nov., Ch. bobadeenensis sp. nov., Ch. carinata sp. nov., Ch. crassa sp. nov., Ch. dickinsonorum sp. nov., Ch. etelis sp. nov., Ch. kimbaensis sp. nov., Ch. orangensis sp. nov., Ch. pulyonna sp. nov., Ch. punctata sp. nov., and Ch. wilarra sp. nov. An identification key to species of Chidaea and to Australian genera of Cixiini is presented. Host plant relationships and distribution are discussed. Chidaea is endemic to Australia and occurs in all states and territories apart from the Northern Territory.

The transfer of two species renders Iolania Kirkaldy, 1902 absent from Australia and endemic to Hawaii. Iolania clypealis Muir, 1931 is transferred into Leades Jacobi, 1928, resulting in the new combination Leades clypealis (Muir). The new genus Yamirrina gen. nov. is created to accommodate Iolania vittipennis Muir, 1931, which leads to the new combination Yamirrina vittipennis (Muir). Another species, Yamirrina concolor sp. nov., is added to the genus. The hitherto monotypic genus Leades is revised, and with the addition of four new species, Leades grandis sp. nov., L. ginginensis sp. nov., L. centralis sp. nov., L. warro sp. nov., and with L. clypealis and L. rufinus Jacobi, 1928, Leades now contains six species in total. Leades and Yamirrina are endemic to Australia. Redescriptions are provided for Leades rufinus, L. clypealis and Y. vittipennis. Identification keys to the genera of Australian Cixiini, and to all species of Leades and Yamirrina, are presented and host plant relationships are discussed. Key words: Homoptera, Fulgoroidea, planthopper, south-west Australia, Hawaii, host plant

The Derbidae fauna of the Seychelles is revised, providing redescriptions for the following species: Aquaelicium brunnescens Distant, 1917, A. elegantulum Distant, 1917, A. typicum Distant, 1917, Equirria phalaena Distant, 1917, Fordicidia robusta Distant, 1917, Paraphenice aurea (Distant, 1917), P. bimaculata (Distant, 1917), Proutista moesta (Westwood, 1851) and Sikaiana albomaculata (Distant, 1917). A new species, Vekunta bri sp. nov., increases the number of derbid taxa known from the Seychelles to 10 species in 7 genera. Lectotypes are designated for the following species: A. typicum, A. brunnescens, A. elegantulum, F. robusta and S. albomaculata. A key to derbid tribes and species of Seychelles is provided.

Planthoppers of the family Cixiidae Spinola, 1839 are economically important owing to their ability to transmit phytoplasmas causing yellows-type diseases. The tribe Gelastocephalini Emeljanov, one of 16 tribes within the subfamily Cixiinae, has never been revised comprehensively. Twenty new genera (Aubirestus, Balyadimetopia, Barbonia, Candicarina, Corylonga, Fletcherolus, Gelastocaledonia, Gurrundus, Guttala, Hartliebia, Holgus, Larivierea, Lipsia, Melanoclypeus, Novotarberus, Payastylus, Rokebia, Schuerrera, Wernindia, Yarnikada) and 50 new species (Aubirestus semicirculatus, Balyadimetopia frederi, B. krahalla, B. marci, Barbonia spectabilis, Candicarina geroldi, C. pulchra, Carolus carinatus, C. stiriae, Corylonga aaroni, C. krottendorfi, C. leighi, C. lobata, C. loisae, C. mahmudae, C. triangula, Fletcherolus lanceolatus, F. monospinosus, Gelastocaledonia monteithi, Gelastocephalus velifer, Gurrundus fuscomarginatus, G. nectostylus, Guttala bernhardtae, G. mona, G. nickeli, G. robierae, Hartliebia towinna, Holgus ancistrus, H. liafredis, H. spiralis, H. unispinosus, Larivierea yalthi, L. yokunna, Lipsia mystrostylus, Melanoclypeus cristatus, M. uncinatus, Novotarberus flagellospinosus, N. pseudorphninus, N. remanei, Payastylus brichrius, P. gekiae, P. kernae, Rokebia australis, Ronaldia emeljanovi, Schuerrera clypeocarinata, S. ecarinata, ,Wernindia bubalis, W. lorda, W. rhomboidea, Yarnikada ulliae) are described. This increases the number of known Gelastocephalini from seven to 27 genera and from nine to 60 species. A new combination, Novotarberus jacobii, is proposed for Gelastocephalus jacobii from New Caldedonia and Cixius merula was transferred into the genus Schuerrera, resulting in a new combination, Schuerrera merula. A preliminary cladistic analysis of morphological data including all species of Gelastocephalini supported the monophyly of the tribe and its genera. The short male anal style is recognised as a synapomorphy for the tribe. The subtribe Rhigedanina was shown to be monophyletic whereas Gelastocephalina is paraphyletic. Three alternative hypotheses are presented to explain the current distribution of the tribe, which is restricted to Australia and New Caledonia. The species Novotarberus jacobii and Gelastocaledonia monteithi seem to be Gondwanan relicts.