Moths in the ACT seems to suggest that Nemophora on Acacia may be another species, and that N. sparsella should be expected on Bursaria in Jan/Feb rather than this time of year - but they certainly look like a good match
Not sure but I think there may be some sexual dimorphism in Nemophora, I think the females (with shorter antennae) have topknots while the males (with long filamentous antennae) lack topknots but have much bigger eyes. This is evident in the two photos of N. sparsella in Moths in the ACT
Interesting. I just had a quick look through the sightings on CNM of both N. sparsella and sp., and the topknots do seem to go with smaller eyes and shorter antennae. The ones where you can see long antennae seem to have the bulbous eyes which don't leave much room for a topknot.
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