There are two images in the draft moith book. If the main thin white transverse line in entire, I call it P. sparsa, if not P. diemeni. The other Pantydia spp. I think are distinct enough nt to be confused with these two. This follows the Moths of Victoria guidelines: Moths of Victoria, Part 8, on their supporting disc, give quite detailed notes on separating the Pantydia spp, they recognize; especially separating P. sparsa from P. diemeni. I quote (at page 2/5 for P. diemeni): 'While most Pantydia can be separated by examining the underside of the hindwing, most live P. diemeni can be recognized by the break in the transverse line (A).' This line is pointed to by an arrow in the supporting illustration. It is the fine white/yellow line running parallel to the trailing edge of forewing in Pantydia species. In Sighting No, 4416300 that line is entire and not broken ie. P, sparsa. In Sighting No, 4416299 that line is not entire and is broken, hence P. diemeni.