Membracoidea: Cicadellidae: Deltocephalinae: Opsiini
The circular dark brown blotch in the middle of the folded forewings is distinctive.
Widely but sporadically distributed in Australia, but also in south-eastern Asia; Fletcher et al. (2009 and updates, https://idtools.dpi.nsw.gov.au/keys/auch/index.html) consider the species to be 'probably adventive' in Australia.
Hishimonus diffractus is listed in the following regions:
Canberra & Southern Tablelands