This beetle is Paropsisterna intacta. A very rotund and large leaf beetle found under bark. I have seen these a dozen times and they are considered common. I have never seen them except under bark. They seem to prefer smooth (white) barked eucalyptus with large leaves.
This is Paropsisterna spp. It belongs in the interlita group but not sure the species. It looks like one that Russel Best has photographed in his lawn. http://natureshare.org.au/observations/53b3985ae35eb12984010d2c?species=Paropsisterna+spp.&tag= It is related to Paropsisterna intacta, an under bark nocturnal species. It features foveae (small dimples) in the sides of the pronotum, emphasized in this case by a black dot. I have seen this only once before at Taggerty on a small shrub. Found on a messmate eucalyptus. Seems to be diurnal
Feeding on flowers of Eucalyptus wimmerensis. I am unsure if this is the same species of moth as the previous posting. It looks a bit different to me, but maybe that is just because this is an older specimen. Not sure.