Hemiptera: Tessaratomidae: (Lyramorpha)
Large semi-urban yard/garden next to a disturbed remnant patch of forest.
There are posted photos of "Lyramorpha rosea" nymphs on various websites that look very much like this specimen. However EOL doesn't treat the genus. The source http://www.heteroptera.fr/tessite/Lyramo... lists range for L. rosea as Australia (but not New Guinea).