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Found on 05 April 2017 in Switzerland, Kerzers (447 m)

I suppose Syrphus ribesii. Is this plausible?

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I am afraid we can see not enough to be sure. I cannot guess whether the eyes are bare or hairy (if ribesii, they should be bare) and if the hind femora is prevalently yellow (the part we can see is yellow).

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Hi,



isn't that decisive only for females?

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Fortunately, I have collected the specimen and checked the following:

- Basal 2/3 - 3/4 of hind femora are black which seems to be typical for S. ribesii males
- Eyes are bare (rules out S. torvus)
- Second basal cell is completely and evenly covered with microtrichia (rules out S. vitripennis)

I think this should characterize it as S. ribesii. However due to a lack of trustworthy literature I am not quite sure.

Best,
Ov