Long-tailed Sawfly larvae

"Sawflies in the Pterygophorinae subfamily are usually banded with bright colours, either orange and yellow, with darken wings. Some species males have comb-like antenna.

Larvae in this subfamily feed on leaves of different native plants. They have six or more pairs of prolegs and a "tail" on the last segment. They do not aggregate in large group. They feed actively in small group during the day."
-http://www.whatsthatbug.com/2011/05/20/longtailed-sawfly-from-australia/