Remarks.—The specimen is considerably darker both above and below than either of two specimens of M. l. alascensis from Red Bluff Bay, Alaska. Alcorn searched ten frame buildings in an abandoned camp on the east side of Screw Creek, for bats and found only the one bat. It was above some droppings. No droppings were found in other buildings.
Ochotona collaris (Nelson)
Collared Pika
Lagomys collaris Nelson, Proc. Biol. Soc. Washington, 8:117, December 21, 1893. (Type from near head of Tanana River, about 200 miles south of Fort Yukon, Alaska.)
[Ochotona] collaris Trouessart, Catal. Mamm. viv. foss., p. 648, 1897.
Specimens examined.—Total 14, as follows: British Columbia: Stonehouse Creek, 5½ mi. W jct. Stonehouse Creek and Kelsall River, 1; W side Mt. Glave, 4000 ft., 14 mi. S and 2 mi. E Kelsall Lake, 13.
Remarks.—In comparing specimens obtained by Alcorn with published descriptions of O. collaris in Howell (1924:35), it appeared that measurable geographic variation might be present in this monotypic species. Accordingly, comparisons were made with materials in the Biological Surveys collection of the U. S. National Museum, the Provincial Museum, Victoria, B. C., and the National Museum of Canada. A comparison of specimens of similar ages showed that no subspecific separation is justified although animals from the Yukon Territory, British Columbia, and Northwest Territories, as compared with available material from Alaska, tend to be grayer in color and longer in total length with a slightly larger skull and greater alveolar length of molariform tooth-row in both upper and lower jaws.
Specimens used for comparison were from the following localities: Alaska: Mts. near Eagle (USBS), 15; 200 mi. S Fort Yukon (USBS), 2; Upper Little Delta River, Glacier Creek, Mt. Hayes region (USBS), 1; Glacier Creek, Mt. Hayes region (USBS), 3; Little Delta River, Slate Creek, Red Mt. Camp, Mt. Hayes region (USBS), 1; Muldron Glacier, Mt. McKinley (USBS), 2; Mt. McKinley (USBS), 3; Summit of Chugach Mts., on Richardson Highway, N of Valdez (USBS), 1; Chitina River Glacier (Nat. Mus. Canada), 3. Yukon Territory: McMillan Pass, Canol Road, mile 282 (Nat. Mus. Canada), 2; Rose River, Canol Road, mile 95 (Nat. Mus. Canada), 8; Tepee Lake (Nat. Mus. Canada), 1; Conrad (Nat. Mus. Canada), 1; near Teslin Lake (Nat. Mus. Canada), 1. Northwest Territories: headwaters of Caracajou River, Canol Road, mile 111E (Nat. Mus. Canada), 1. British Columbia: White Mt., Moose Arm, Tagish Lake, Atlin (Prov. Mus., Victoria, B.C.), 2.
Lepus americanus macfarlani Merriam
Varying Hare