
Blue Ant - female (Diamma bicolor)
This is a wingless female flower wasp known as a blue ant or blue bottle becuase of its appearance. the females are very difficult to photograph as they are always on the move, probably looking for beetle larvae to paralyse and lay eggs on. The developing wasp larve feed on the beetle larvae. Adult wasps feed on flowers.
The male of the species can be seen here

The blue ant is, despite its name and its appearance, not an ant at all, but rather a species of large solitary parasitic wasp sometimes known as a flower wasp. It is a native of south and southeast Australia, including the Australian states of Tasmania, New South Wales, Victoria and South Australia.