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Hello Pierre,
Not Pipiza, because their forehead would protrude conically, that would mean that you would see on a photo like this (the first one) a bigger bulge where the antenna is situated. Also Pipiza would normally be a bit bigger a guess, this one seems rather small.
This looks to me like a male in the genus Heringia (Neocnemodon is the old name)! ;)
Greetings, Gerard