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Hi.
I found this Syrphidae female while it seems to be laying eggs at the base of an old poplar im a humid broadleaf forest.
On the same tree there was some Brachyopa (probably B. scutellaris).
I think it is Criorhina asilica but why not C. pachymera ?
France - Flines-les-Mortagne - Nord (59)

Thanks a lot.

https://rehost.di...t/f/509917
https://rehost.di...t/f/509918