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The key by I. M. White (Tephritid Flies) is available on Pemberley Books for £20, but you might pick it up somewhere else more cheaply, perhaps.
Just been doing a few Tephritids myself from the summer, this morning. Nothing unusual, so far...
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thanks for the key info, I'll collect this one when I see it again. All five (so far) species here seem to like sheltering in this one evergreen shrub, surrounded by Ivy which they ignore. I must get the shrub identified, it's got red berries now
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I agree this looks like Tephritis conura, and I believe it would key out to that species in White's key, but another species has been added since White's key was published - Tephritis matricariae. These two are very similar, and require close examination of the colour of one particular bristle (the posterior notopleural bristle) on the thorax, and differences in the genitalia. T. matricariae is also smaller (wing length 3.3-4.5mm, for T. conura it is 4.6-5.7mm).
Reference for T. matricariae is: Clemons, L. 2000. Tephritis matricariae (Loew, 1844) (Dip.: Tephritidae) new to Britain and breeding in East Kent. Entomologist's Record 112(5): 225-230.
As far as I know it has spread through much of southern Britain since its discovery in Kent (I've recorded it from Northamptonshire).
Entomologist and biological recorder
my first specimen of the year collected this morning and it appears to be one of these. What should I look for to distinguish the two species? I see from my Platypezid thorax-map where notopleural bristles are located, so should presumably pin the specimen from above rather than from the side. The fly looks very small, wing-length looks less than 4.5mm, but lacks the green eyes I've noticed on images of matricariae
Edit: Added is an initial image of yesterday's specimen. Does it at least show the correct area for closer scrutiny?
Yes, that shows the correct area for the two notopleural bristles, and the hind one is clearly a pale yellowish colour.
all images now of the same individual fly, collected 1st Jan 2013.
32 hours in the freezer, and all legs wriggling furiously, a nightmare!
Shrub identified as Evergreen Spindle
Lat/Lng: 51.6039, -0.0761
OS grid ref: TQ333912