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the last two are safely Leptomydinae. The shape of antenna is typical for Leptomydas sp. (the other Leptomydinae is Syllegomydas... but this is not the case) The first is a Leptomydinae, not sure if it is also Leptomydas.

It would be great if you have Perissocerus - the shape of antenna is really crazy. Like a Trifolium leaf. :|

I never saw one but I know they are extremely fast flies. They also are very common in the West Coast of Australia. :)