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looking for help, to identidy these Medetera, found sitting on a wall in big numbers, next to a rape field, in North Jutland /Denmark, and about 2,5mm

i tried keying them, using HIBI vol IX part5 /Fonseca, and ive been looking at both males and femlaes. i am aware of, there might be some species in Denmark, not included in a british key, and that might be the issue here.

it went pretty easy through the key, and ended on impigra, but the surstylus doesnt fit :(

mid tibia with dorsal seta at base = 2
scutellum with 4 seta = 3
dorsocentrals getting smaller, going forward = 10
postical vein not thickened in either male or female = 12
the whole antenna black = 16
outer section of postical vein, more than 1,5 times lenght of outer crossvein = 17
legs dark = 19
halter yellowish, and arista longer than face = 20
anteroventral seta on mid femur, short on females. does not reach lenght og half femur depth = 21

= impigra,
BUT, male genitalia proves me wrong

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