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Geographic distribution of Culex tarsalis in North America (shaded) with sites (white dots) indicating where Cx. tarsalis pools were collected in western Canada, California (CA, Kern County), and Colorado (CO, Larimer County). For British Columbia (BC), Alberta (AB), Saskatchewan (SK), and Manitoba (MB), mosquitoes were trapped near the cities of Vancouver, Calgary, Saskatoon, and Winnipeg, respectively. Map modified from Darsie and Ward.27
