This specimen certainly looks like Phylomictis eclecta, but without the black mark on the discal margin of the forewing. However I notice on Bold Sysyems 4 and LBH some images of the species lack this mark. Perhaps prescence of the black mark is due to sexual dimorphism. I note also the recorded distribution is 'Queensland', not southern Victoria. Nevertheless I'm prepared to propose this observation is the suggested species P. electa. There are other Phylomictis (genus) species eg. P. synconop and P, lintearia, both with more southerly distributions and brown markings on the forewing, but this specimen laks those brown markings. Another optioin would be to just identify this observation as Phylomictis (genus)