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Hello,

I thinks this a Cheilosia. But which one?

Thanks in advance for any information.

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I think a male of Cheilosia caerulescens.

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Paul,

That was also what I thought. With the whitish pilosity...

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not only the pilosity but also the dark mark on the wings and the protruding face (you can just see the face through the flower...) make this fly a C. caerulescens. In Belgium this species made a remarkable upcoming. Before 1991 only 4 specimens were known, all in the surroundings of Li?ge, nowadays about everyone who looks at syrphids has it on his garden list (so do I ).

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Hello,

Thanks for the additional criteria.