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:o

I see how difficult this could be! I found a page full of Drosophilidae, unless there is only one which has the yellow halteres. I think it is likely to be a Drosophila sp. though, there's a couple there I looked at which seem to have a similar mouth part.

http://rice.bio.i...ophilidae/

Of course this is in Texas, and I don't know how many we have here but I imagine it' quite a lot.:(