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Hi Ben and Paul,

It looks like the dorsal suface of the thorax is partly "rusty brown". This would indicate that we are not dealing with apicalis/geomyzina, but with ruficollis, which both should have the thorax black (appart from white stripe in front of the wing base). I have to admit though that in comparison with the specimens of ruficollis that I have seen, it is extremely dark.
I suppose you didn't collect the specimen, Ben?

Jan Willem