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I have taken this specimen through the Iberian Merodon key but it's very unfamiliar to me and I have no reference specimens. I don't think that it can be geniculatus because the mid coxa looks hairy. In van Veen it keys out to the pair albifrons/natans but the range of this book does not extend to southern France. Is there someone who I might be able to send the specimen to? Andre? Would you be willing to look at the specimen, or could you recommend someone who might? Thank you! Joan