#2
This looks like a
Culiseta male, possibly
bergrothi (Culicidae), but it could be an
Ochlerotatus which I don't recognize. The lack of wing spots suggests
Cs.glaphyroptera, but all the Scandinavian records were shown to be
bergrothi.
#6
I believe that those rocky coast localities might be good for
Cs. glaphyroptera. It is described in the literature as a mountain species that breeds in rocky pools. If you have a chance, try to look for overwintering individuals in basements and other suitable spaces. Also in Gothenburg, especially in the Högsbo area you might look for
Culex pipiens molestus, a species that is becoming a nuisance indoors. It is spreading also to Guldheden and Hisingen, but so far seems to have its stronghold in Högsbo.