Longicorn Beetle - ? wasp mimic

Description:

This longicorn beetle was about 25 mm long and looked very much like a wasp. But unlike a wasp it was not flying around but clambering over the flowers. Its antennae were also a giveaway; they were long, slightly curved with elongated segments. What was wasp like were the thin and fragile-looking hind wings which were exposed because of highly reduced elytra. The abdomen had white rings and legs were long and brown.

Habitat:

Spotted on tea-tree flowers in a Reservoir park ( Cardinia)

Notes:

Probably H.plorator. Thanks to Mark Ridgway for help with identifying this longicorn.