The wikipedia article you linked to says that the adults of that species feed only on nectar and do not suck blood.
Which isn't quite where Alaska is located.
Maybe they were thinking of this one. https://en.wikipedia.org/wiki/Culiseta_alaskaensis
This one had a large size and was a blood sucker, but wrong side of the continent again. https://en.wikipedia.org/wiki/Psorophora_ciliata