indicate that the range of B. b. carolinensis extends up the Missouri River Valley, approximately to Nebraska City, Otoe County. Five specimens from Louisville, Cass County, the next county northward, along the River, are referable to B. b. brevicauda.

Eptesicus fuscus fuscus. (Beauvois). Big Brown Bat.—One big brown bat was obtained on July 23, 1952, from one mile west of Niobrara, Knox County. While not so dark in dorsal coloration as some specimens of E. f. fuscus from eastern Nebraska (Cass and Sarpy counties), this specimen is noticeably darker than a series of E. f. pallidus from Ft. Niobrara Wildlife Refuge, 4 mi. E of Valentine, Cherry County, being near (16" j) Snuff Brown as opposed to near (16' i) Buckthorn Brown. Previous to the taking of this specimen, Webb and Jones (1952:277) reported as E. f. pallidus a specimen, saved as a skull only, which was picked up dead at Niobrara. It seems best to assign these two bats from the vicinity of Niobrara, Knox County, to E. f. fuscus.

Sciurus carolinensis carolinensis Gmelin. Gray Squirrel.—An adult male gray squirrel shot by Mr. Terry A. Vaughan in the heavily timbered bluffs of the Missouri River, 3 mi. S, 2 mi. E of Nebraska City, Otoe County, on October 10, 1953, provides the only museum specimen of a gray squirrel from Nebraska known to me. Residents in the area concerned report small numbers of this squirrel as still occurring on the heavily wooded bluffs along the Missouri River in Nemaha, Otoe and Richardson counties, Nebraska, at least as far north as Nebraska City.

Gray squirrels from Nebraska have been reported twice before in the literature as follows: "Mouth of Platte [River]" (Baird, 1858:262) and Barada, Richardson County (Jones and Webb, 1949:312). Swenk (1908:80), while listing no actual records, says of this squirrel, "Common in the timber along watercourses of southeastern Nebraska, but greatly outnumbered everywhere by [Sciurus niger] rufiventer. I have no records west of the 97th meridian nor north of the Platte."

Spermophilus franklinii (Sabine). Franklin Ground Squirrel.—A specimen from 2 mi. NW of Lisco, in Morrill County (NSM 3324), extends the known geographic range of S. franklinii approximately 200 miles westward along the Platte River Valley from Kearney, Buffalo County (see Howell, 1938:134), and suggests a westward movement of this ground squirrel along the Platte River in recent years.

Perognathus flavescens flavescens Merriam. Plains Pocket Mouse.—P. f. flavescens occurs in the Sand Hills and adjacent mixed-grass plains of central Nebraska. Eastern marginal records of occurrence are: Neligh, Antelope County, 2 (MVZ 1, NSM 1); 1 mi. E of Ravenna, Buffalo County, 2 (MZ); unspecified locality in Adams County, 1 (HM).

Perognathus flavescens perniger Osgood. Plains Pocket Mouse.—This mouse occurs in northeastern Nebraska. Osgood (1904:127), in the original description of the subspecies, listed two specimens from Verdigris [Verdigre], Knox County. Additional records of occurrence are: Beemer, Cuming County, 2 (USBS); 1-1/2 mi. SE of Niobrara, Knox County, 3; 1-1/2 mi. S of Pilger, Stanton County, 2.

The two specimens from Beemer are typical perniger. All of the other Nebraskan specimens are intergrades between P. f. flavescens, geographically adjacent to the west, and P. f. perniger to the east but are best referred to perniger on the basis of greater total length, larger cranial measurements and darker dorsal coloration.

P. f. perniger was originally described (Osgood, op. cit.) on the basis of its darker dorsal coloration and encroachment of the lateral line on the posterior parts of the venter. The latter character is not