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Panorpa ?
Yes, Panorpa sp. and my closest guess would be Panopa vulgaris.
http://www.ecotourismus.de/tierwelt_euro...
http://www.wildabouttheworld.com/gallery...
http://en.wikipedia.org/wiki/File:Panorp...
You have 7 different species in France, it is not Meridionalis from the South West and probably not Etrusca from only the farest South East, but also very rare one.