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Chalcosyrphus curvaria - Chalcosyrphus curvarius - female

Chalcosyrphus curvaria - Chalcosyrphus curvarius - Female
Flower Station, Lanark, Ontario, Canada
July 25, 2009
Size: 20mm
This fly was moving about on fabric surfaces - on a pant leg, then onto a backpack, then onto camera bag. I believe it is Chalcosyrphus curvaria as it looks identical to an image of that species in Stephen Marshall's "Insects: Their Natural History and Diversity".

Moved from Chalcosyrphus.

Either Chalcosyrphus curvaria
Either Chalcosyrphus curvaria (if hind coxae are entirely black and halteres yellow) or C. plesia (if hind coxae have a small bit of orange and halteres are brown). I can't see enough detail to tell between the two.

This is curvaria
This is curvaria

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