Published online by Cambridge University Press: 31 May 2012
Males and females of Phlebotomus vexator occidentis Fairchild and Hertig and P. aquilonius Fairchild and Hardwood were collected from burrows of yellow-bellied marmots, Marmota flaviventris nosophora Howell, in southern Alberta. P. v. occidentis adults were collected from burrows at collecting sites at Police Coulee (111°39′ W. long., 49°3′ N. lat.) and Lethbridge (112°52′ W. long., 49°39′ N. lat.), whereas P. aquilonius adults were collected only at the Police Coulee site. The Lethbridge location is a new northern limit for distribution of P. v. occidentis. The seasonal occurrence of adults of P. v. occidentis is July to September and P. aquilonius is August to mid-October.