A black wedge-shaped beetle about 15 mm long with white specks on elytra and dramatically flabellate antennae. Legs were a deep brown with black colouring at the femoral and tibial joint. A slightly humped scutellum and head were also black.
Spotted on a young eucalyptus tree in a small reserve.
The larvae are ecto-and endoparasitic on other insect larvae, possibly of cicada.
Commonly called feather-horned beetle.
Thanks to Martin Lagerwey for ID confirmation. His comments: Mainly Victorian beetle is nocturnal and each observation that I have made was under bark. Light trapping is a good way to encounter one. The color of the eight dots can be red or orange or yellow but otherwise they do not vary much.