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Colgar sp.
About 0.5"
Maybe this helps:
http://www1.dpi.nsw.gov.au/keys/fulgor/i...
This might be the same or similar one:
http://www.flickr.com/photos/gbohne/6248...
Key issue would be the red margin, the shape of the apex (round or "spiky" as in yours) and the shape of the head, there are some with rounded heads and some with some kind of nouse.