If my proposed ID is correct then this is a seldomly recorded species based on what I can see online. See https://www.inaturalist.org/observations?taxon_id=1074989 https://bie.ala.org.au/search?q=Proteuxoa+leptochroa
http://www.boldsystems.org/index.php/Taxbrowser_Taxonpage?searchMenu=taxonomy&query=Proteuxoa+leptochroa+&taxon=Proteuxoa+leptochroa+ I see no records for this species in the ACT online. P. piliocrossa looks similar, but records of that species are from WA and Tasmania, not NSW or Victoria.