Range
Most of North America, but more common in cooler areas.
Habitat
Typically cool running water
Season
Includes several winter-emerging species
Remarks
The most commonly photographed fly in this subfamily is Diamesa nivoriunda, which flies in winter in northeast USA. Confirmation requires close examination of male genitalia.
Contributed by
tom murray on 3 December, 2008 - 7:19pm
Additional contributions by
Vox SciurorumLast updated 21 February, 2016 - 8:29am