A useful reference for Leafhoppers & planthoppers in Australia:
https://idtools.dpi.nsw.gov.au/keys/leafhop/index.html
Chaetophyes compacta at Linley Point, NSW
Colgar sp. (genus) at Linley Point, NSW
Siphanta sp. (genus) at Lindfield, NSW
Colgar sp. (genus) at Lane Cove, NSW
Aphrophorinae (subfamily) at Lane Cove, NSW
Siphanta sp. (genus) at North Ryde, NSW
Scolypopa australis at Lindfield, NSW