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Stephen Thorpe Honorary Research Associate School of Biological Sciences University of Auckland
Auckland, New Zealand
Or perhaps a closely related genus like Cletus.
This is certainly a ptinine, but not Ptinus speciosus, which is endemic to N.Z. (http://www.nzor.org.nz/names/2da2f80f-29...) and not present in Australia (no record here https://biodiversity.org.au/afd/taxa/Pti...). The ALA record linked to above appears to be a messed up mishmash of species from both Australia and N.Z.!
It may be a brachypterous adult.
Looks like genus Bracon. Possibly a parasitoid of Phylacteophaga.