Peromyscus maniculatus algidus Osgood
White-footed Mouse
Peromyscus maniculatus algidus Osgood, N. Amer. Fauna, No. 28:56, April 17, 1909. (Type from head of Lake Bennett, site of old Bennett City, British Columbia.)
Specimens examined.—Total 93, as follows: Alaska: E side Chilkat River, 100 ft., 9 mi. W and 4 mi. N Haines, 20; 1 mi. W Haines, 5 ft., 7. Yukon Territory: 6 mi. SW Kluane, 2550 ft., 10; McIntyre Creek, 2250 ft., 3 mi. NW Whitehorse, 6; 2 mi. NNW Whitehorse, 2100 ft., 2; W side Lewes River, 2150 ft., 2 mi. S Whitehorse, 16; SW end Dezadeash Lake, 9; 1½ mi. S and 3 mi. E Dalton Post, 15. British Columbia: Stonehouse Creek, 5½ mi. W jct. Stonehouse Creek and Kelsall River, 8.
Remarks.—Specimens from the localities listed above are in the geographic range of P. m. algidus as outlined by Anderson (1947: 136). Specimens from the vicinity of Haines, Alaska, are slightly darker indicating intergradation with P. m. hylaeus; Osgood (1909a: 54 and 56) also noted that intergradation between P. m. algidus and P. m. hylaeus occurs in this area.
Peromyscus maniculatus borealis Mearns
White-footed Mouse
Peromyscus maniculatus borealis Mearns, Proc. Biol. Soc. Washington, 24:102, May 15, 1911. Substitute name for P. m. arcticus Mearns. (Type from Fort Simpson, Mackenzie, Canada.)
Specimens examined.—Total 214, as follows: Yukon Territory: 2 mi. W Teslin River, 2400 ft., 16 mi. S and 56 mi. E Whitehorse, 8; W side Teslin River, 2300 ft., 16 mi. S and 58 mi. E Whitehorse, 24; E side Teslin River, 2300 ft., 16 mi. S and 59 mi. E Whitehorse, 7. British Columbia: 1 mi. NW jct. Irons Creek and Liard River, 10; Hot Springs, 3 mi. WNW jct. Trout River and Liard River, 6; N side Liard River, ½ mi. W jct. Trout River and Liard River, 13; ¼ mi. S jct. Trout River and Liard River, 20; SE end Muncho Lake, 5; S side Toad River, 10 mi. S and 21 mi. E Muncho Lake, 45; N side Muskwa River, 1200 ft., 4 mi. W Fort Nelson, 9; North Fork Tetsa River, 3900 ft., 4 mi. ENE Summit Pass, 13; Summit Pass, 4200 ft., 10 mi. S and 70 mi. W Fort Nelson, 17; E side Minaker River, 1 mi. W Trutch, 18; Beatton River, 115 mi. S Fort Nelson, 2; 5 mi. W and 3 mi. N Fort St. John, 7. Alberta: Assineau River, 1920 ft., 10 mi. E and 1 mi. N Kinuso, 10.
Remarks.—Specimens from 2 miles west of Teslin River resemble P. m. borealis more than P. m. algidus both in size of skull and in color, although I find it difficult to distinguish the specimens by color.