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July 04, 2006.
Size around 3mm.
Could this one be the same as the fly in a thread by Vadet:
http://www.diptera.info/forum/viewthread.php?forum_id=5&thread_id=36&pid=102#post_102

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Another view.

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This is Chamaemyia and looks very like C. fasciata

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OK many thanks David

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This is what I knwo of Chamaemyia with black abdominal bands:
* Third antennal segment darkened apically, tarsi completely yellow, as a whole more greyish dusted. -> fasciata
* Third antennal segment yellow, last tarsal segment darkened, more yellowish grey dusted. -> elegans

I am not quite sure where that leaves us, with apparently all yallow antennae, all yellow tarsi and greyish dusted body. Score 2-1 for fasciata, I guess.

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specimens i have named as fasciata have entirely yellow 1st flagellomere and look just like the above photo.

Is there an error in Collin's 1966 key? he says ?More yellowish-grey species with third antennal joint distinctly darkened towards tip?? elegans Pnz.
Whitish-grey species with third antennal joint almost entirely yellow?. fasciata Lw.?

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Well, the family Chamaemyiidae is notoriously difficult. Recent work on the European fauna has only been done by Tanasiichuk and I think I took this from an older work by him. In a more recent work on the Diptera of the Russian Far East (2001) there is one species with banded abdomen and it is refered to as:
Ch. fasciata Lw. (elegans Tanas., non Panzer)

That might mean that Collin (and you) are right and that I followed a wrong interpretation by Tanasiichuk. I will see if I can find out more.