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Hello everyone,

is my determination correct?

Location: Germany, Rhineland-Palatinum, 53572 Unkel, river Rhine valley, Stux hill, dry and warm habitat (grapeyards), nearby deciduous forest (oak, Fagus ...), April 21st, 2025

Thanks in advance,

Michael

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X. stackelbergi, I think: more yellow spots on sides of thorax.
Bot, van de Meutter (2023): Hoverflies of Britain and NW-Europe

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Hello Eric,

now I have the book Bot / de Meutter, and I have overlooked the page 179 with the species X. pedissequum, stackelbergi and dives.

I have a second (and last) photo. I think, the median stripe of the head is connected with vertex: X. pedissequum or dives, but not stackelbergi. And the side of the thorax has more than two yellow spots, as you had mentioned: X. stackelbergi or dives, not pedissequum. And I think (hard to see), the wingtips are darkened; that speaks in favor of X. dives as well. So I think, X. dives is the most probable species. But I am not an expert. What do you (and others) think?

Thanks for your answer,

Michael