Members of the genus Platycheirus are found from Alaska and Canada through much of the United States, and in many parts of Europe. Some even live in the western part of the southern cone of South America.
Larvae of Platycheirus crane flies are aphid eaters.
Photo location, above: Near Peel River ferry, Inuvik District, Northwest Territories
Top two: Near Ruraldale, Upshur County, West Virginia
American Insects site