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This one is from a malaise trap 7th to 13th July 2008. A warm sunny path through a mixed deciduous forest at 750 m a.s.l. in the Kerkini mountains of Northern Greece.

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I think it is Lonchaeidae. Cannot recall having seen any species with infuscate wings before, though.

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Hi Paul,
I see why you might say that, ovipositor, one F-bristle near ocelli. But Oosterbroek says the wing is always unmarked in Lonchaeidae (although he doesn't mention Ulidiid wings as being wholy infuscate either) and look at the anal cellcup with CuA2 being geniculate. There are 2/3 bristles at posterior edge of the anepisternum, but the whole anepisternum is covered in stout black hairs. Black-on-black is hard to see with my meagre lighting and impossible to photograph.
Gordon

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I see the cell cup now. I did not look properly the first time. Well, yes, then this might be Ulidiidae. Let's see if Nosferatomyia comes to have a look...

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Hi Gordon

I am not quite sure what the reference to Oosterbroek is, it a publication I have not come across - however in relation to wing colour in Lonchaeidae he is wrong there are several species, mainly tropical or subtropical, with infuscated wings either entirelly infuscated, as in your photograph, or occasionally. just infuscated apically. One key thing abot Lonchaeidae is that they always have black halteres - in your specimen they are apparently pale - the front of the thorax is also a bit to "streamlined" to be a Lonchaeid

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Thanks Ian. Oosterbroek's book is on the 'Families of Diptera of Europe' so it may yet be corrct for the geographic range it covers.

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A Ulidia, apparently U. nigripennis Lw. or U. atrata. Both are common in Greece. The differences could be seen on a dry specimen, but not on the alcohol one. See Kameneva, E.P. 2008. New and Little-Known Ulidiidae (Diptera, Tephritoidea) from Europe. - Vestnik zoologii, 42(6).