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Can anyone suggest a family for this fly? Light trap, Townsville, Queensland.

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Ephydridae, looks like Ephydrella sp.

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One of the most common species in Australia is E.breviseta (Malloch). Australasian/Oceanian: Australia (New South Wales, South Australia, Tasmania, Victoria, Western Australia), but it is difficult to tell surely for genitalia are usually to be studied to determine species from this genus

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Thanks Cranefly. I don't do genitalia, so am quite happy with a probably.

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There seems to be a long slender bristle present under the arista, which would exclude Ephydrella and points to Setacera breviventris.