Looks like a good match to Calomela acaciae (https://bie.ala.org.au/species/urn:lsid:biodiversity.org.au:afd.taxon:e615781c-bc65-46fb-a0a6-736579f0233e#gallery). However given the large number of species in this genus and the fact that all current records on ALA are to the west of Melbourne, it might be prudent to leave it at Calomela sp.