@MatthewFrawley Just had a quick look on eBird. On 15 May, 2025, 12 were reported. On 23 October, 2018, 23 were reported. 2025 has been a good year for them here.
received mail recently from buprestid authority Peter Lang (via I-Naturalist); it reads
"This matches syntype material of Melobasis pretiosa at the SA Museum (and M. fasciata is a junior synonym of M. pretiosa). It is not the same as M. sexplagiata. See: https://syzygium.xyz/buprestidae/species.php?species=Melobasis_pretiosa"