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Sorry for interfering, but I need to say something...

Caracal, Pierred, even if you compare pictures in the net, trying to ID Dilophus this way is very 'dangerous' ;) First because you cannot trust blindly what you see in the net (in general terms, there are many erroneous IDs, some being real blunders; the net is filled with 'wild guessing' IDs that bring even more mistakes, and I am not talking just about Bibionidae) but also because in the case of Dilophus, males only can be IDed through genitalia and females are at the same time variable and most species too similar. Particular morphological details well in focus would be necessary to IDed them and just through pictures there is usually a shadow of doubt.

I am not an expert in Bibionidae but I have dealt with them enough to be completely with Theo: Dilophus sp. is the only name that can be given through those pictures.