There are only 10 species of Cercopids in Australia. The nymphs build a shelter of bubbles made of excess plant sap.
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References
Fletcher, M. J. (2009 and updates). Identification keys and checklists for the leafhoppers, planthoppers and their relatives occurring in Australia and neighbouring areas (Hemiptera: Auchenorrhyncha). Available at: https://idtools.dpi.nsw.gov.au/keys/auch/index.html Last accessed 5 May 2012.
Liang, A. P. and Wang, R. R. 2012. A revision of the endemic Australian spittlebug genus Anyllis Kirkaldy (Hemiptera: Aphrophoridae) with descriptions of two new species. Journal of Natural History 46 (15–16): 1005–1023.