Cantharidae, Chauliognathinae, Chauliognathini, Chauliognathus sp. and most probably not Chauliognathus tricolor as indicated on many webpages based on a once wrong or missspelled ID on a trustable site!!
http://www.brisbaneinsects.com/brisbane_beetles/YellowSoldierBeetle.htm
I only found a second ID on an also trustable site, but not sure if the ID itself is trusted by experts.
http://biocache.ala.org.au/occurrences/e77a8ead-d393-4219-bddb-09a39f0de165
All the same and all yours...
https://www.flickr.com/photos/arthur_chapman/5316605533/
http://photography-on-the.net/forum/showthread.php?t=1097700
http://www.ozanimals.com/Insect/Soldier-Beetle/Cantharidae%20family/.html
https://www.flickr.com/photos/jen_in_brisbane/3077125582/
https://www.flickr.com/photos/58356728@N07/23507141083
https://www.flickr.com/photos/58356728@N07/30865876734
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