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This one had me fooled. I thought it was for sure a Xylota or related genera, but in the photograph it has Eristalinae wing venation. So, is this Merodon avidus?
Nebian, Herault, France.
Flying under dappled shade in open srcub and orchards.
It took me almost two and a half hours to get this photo of this fly!!

The good news is I managed to collect a specimen - hurrah!