Specimens examined.—Total, 44, distributed as follows:
Kansas: Brown Co.: Horton, 1. Douglas Co.: Sec. 8, T. 123, R. 20E, 51/2 mi. N, 13/4 mi. E Lawrence, 10; 5 mi. N and 11/2 mi. E Lawrence, 3; Robinson Farm, 5 mi. N and 3 mi. E Lawrence, 2; 4 mi. N, 21/2 mi. E Lawrence, 1; Lakeview, 2; 71/2 mi. SW Lawrence, 1. Greenwood Co.: 1/2 mi. S Hamilton, 1.
Missouri: Cole Co.: Jefferson City, 2 (MO). Jackson Co.: no exact locality, 1 (USBS). Jefferson County: Pevely, 1 (USBS).
Nebraska: Blaine Co.: Dismal River, at Thomas-Blaine County line, 1 (NGFP). Boyd Co.: 2 mi. E and 15 mi. S Spencer, 1. Buffalo Co.: Platte Meadows, Kearney, 1 (HM). Butler Co.: 5 mi E Rising City, 1. Cherry Co.: Niobrara River, 18 mi. NW Kennedy, 1; Ballard Marsh, 20 mi. S Valentine, 1 (JKJ); Pony Lake Headquarters, Valentine Nat’l Wildlife Refuge, 1 (JKJ). Colfax Co.: 2 mi. S Schuyler, 1 (JKJ). Cuming County: Beemer, 4 (USBS). Dixon Co.: 3 mi. NE Ponca, 1. Platte County: Columbus, 1 (USBS). Richardson Co.: 5 mi. SE Rulo, 1 (NGFP).
Oklahoma: Tulsa Co.: Mohawk Park, 2 (UM).
South Dakota: Bennett Co.: Batesland, 1 (FM).
Marginal records.—South Dakota: Batesland. Nebraska: 3 mi. NE Ponca; Beemer; 5 mi. SE Rulo. Missouri: Pevely. Oklahoma: Mohawk Park. Kansas: 1/2 mi. S Hamilton. Nebraska: Platte Meadows, Kearney; Ballard Marsh, 20 mi. S Valentine; Niobrara River, 18 mi. NW Kennedy.
Zapus hudsonius preblei new subspecies
Type.—Male, adult, No. 73085, U. S. Nat. Mus., Biol. Surv. Coll.; Loveland, Larimer County, Colorado; obtained on July 23, 1895, by E. A. Preble, original No. 435.
Range.—Southeastern Wyoming and north-central Colorado. See [fig. 47]. Zonal range: Transition.