Bristle Fly - Tachinidae sp

http://www.brisbaneinsects.com/brisbane_tachinids/UnknownTachinid.html

Tachinid flies are commonly known as parasites of caterpillars, bugs, moths, grasshoppers, and earwigs. They lay their eggs near or in the host; the larvae then burrow their way into the body of the host, sucking its bodily fluids and eventually killing the host. The adult Tachinid flies feed on nectar and pollen.