My suggestion of Obrida fascialis (One banded longicorn) comes from the following references: Firstly longhorn beetles: http://www.ento.csiro.au/biology/cerambycidae/cerambycidae.html# .....which led to: http://www.ento.csiro.au/biology/cerambycidae/info_pages/Obrida.html .....then http://bie.ala.org.au/species/urn:lsid:biodiversity.org.au:afd.taxon:172ccfb9-4df8-4df8-8c87-4c72061f5ce7 ......and http://www.projectnoah.org/spottings/1124696025