@ibaird Alison Pearson on one of the entomology groups suggested e. velox as a possibility. To me it feels like synethes is too brown? This was strictly grey and white in person.
If confirmed this would be a new species for CNM. This species has previously been rcorded in thr ACT at Aranda, see http://lepidoptera.butterflyhouse.com.au/elac/velox.html