Hi Michael, understand perfectly! Melobasis thoracica, if that is what this is, has a wide distribution in the SE of Oz (a single record in the Atlas of Living Australia - ALA - of its purported occurrence at 'King George Sound', i.e. Albany, in southern WA, is extremely dubious as to such provenance and will require confirmation), so it very likely occurs near to wherever you live, in case you get a chance to go look. Especially look for it on the foliage of Acacia spp., (around Sydney it favours Acacia fimbriata but it might favour a different Acacia sp. in your area). Here is a link to the species on Dr Peter Lang's absolutely brilliant web page for this species: https://syzygium.xyz/buprestidae/species.php?species=Melobasis_thoracica