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Looking through Seguy's Faune de France volume, I'd say that this fly is likely to be in the Anthracinae, but there's nothing in France that is this big. We'll have to wait for someone with better literature or a good Portugese or Spanish collection to help with this ID.
The name Arabia S?nchez Terr?n was mentioned on the Fauna Iberica site as a compiler for Bombyliidae. I believe he can be contacted at the Natural Science Museum in Madrid.