Could this be Cadmus (cadmus) pacificus @AlisonMilton ? https://tasmanianinsectfieldguide.com/hexapoda/insectsoftasmaniacoleoptera/insectsoftasmaniacoleoptera-suborder-polyphaga/superfamily-chrysomeloidea/chrysomelidae-leaf-beetles/subfamily-cryptocephalinae/genus-cadmus/cadmus-cadmus-pacificus/