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Thank you, Paul, for your reply. I take note of your remark concerning the change of the scientific name of the insect. The new name is therefore S. lacustris.
I was not aware of this change because I compared my fly to the species present in the LMDI gallery and it is the name S. tenuicosta which, for the moment, appears there.
On this subject, Eugène, from LMDI, tells me that "for the gbif S. tenuicosta still exists and is well mentioned in France"...
Sincerely,
Dominique