Searches in winter near George Lake (53057 N, 114006' W) revealed 108 females of Anopheles earlei Vargas in man-made rockpiles, 210 were collected from root cellars, and 127 were trapped emerging from badger burrows in spring. Rockpiles also yielded 102 females Culex territans Walker, one Culiseta alaskaensis (Ludlow) and one Culiseta silvestris minnesotae Barr. Two Cx. territans females were found in a logpile and one was trapped emerging from a burrow. All 271 An. earlei and 87 Cx. territans from overwintering sites were without any trace of blood meals, and all were inseminated and nulliparous, except for one uninseminated and one parous An. earlei from the burrows. Follicle development of overwintering females suggested that they were still in diapause, except for some An. earlei from the root cellars and burrows.