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I posted these photos in October, when I found this moribund Coenosia, but later deleted the post after there were no takers. Now I am the proud possessor of an antique Nikon stereo microscope from Ebay and a copy of Muscidae of Central Europe, so I thought I'd have a go at my only specimen. Unfortunately the key led me to a species (C. emiliae) we don't have in Britain. Is it probable that this fly is one the book doesn't cover, or have I gone horribly wrong somewhere?

The characters are checked were:
No approximated av +ad on t3
no dilated 5th tarsomere
no approximated d+pd on t3
long lower squama
female
no spine-like tip to flagellomere
proepisternum with 2 setae
pd on t3
no ad on t1
femora not entirely yellow

Shall I give up and wait for something easier to fly along?