@MichaelMulvaney what about Monolepta subsuturalis? Looks like these photos https://tasmanianinsectfieldguide.com/hexapoda/insectsoftasmaniacoleoptera/insectsoftasmaniacoleoptera-suborder-polyphaga/superfamily-chrysomeloidea/chrysomelidae-leaf-beetles/subfamily-galerucinae/genus-monolepta/monolepta-subsuturalis/