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Hello

Yesterday, I found this fly on a leaf outside a garden, near a field. I think it is a Phaonia of the "valida/errans/tuguriorum/scutellata" group but I am not sure of the species. tuguriorum or scutellata since there is only one pre-scutellelar ac ?

Thank you in advance.

Found in Vernoy, Yonne, Bourgogne, France, on the 29th of September 2021.
Body length : around 10 mm.