88 Gary Identity of Eutamias pallidus (.Allen). 



foot of the Camp Thome specimen (relaxed from dry skin) measures 32, 

 a millimeter less than the average. Average of four adult males of E. 

 minimus from Green River, Wyoming: Total length, 188 (180-195); tail 

 vertebrae 87 (80-92) ; hind foot, 30. 



The skull of the large female from Painted Robe Creek, Montana, meas 

 ures : Occipito-nasal length, 34 3 ; basilar length of Hensel, 26.5 ; zygoma! ic 

 breadth, 19.1 ; greatest breadth of braincase, 16.8. Another skull from the 

 same locality measures: 32.1 ; 24.4; 18.5; 16.5. A large skull from Powder 

 River Basin, Wyoming : 32.9; 24.8; 18.2; 16.5. Average of four skulls of 

 minimus from Green River : Occipito-nasal length, 30.3 ; basilar length of 

 Hensel, 23.1 ; zygomatic breadth, 17 ; greatest breadth of braincase, 15.4. 



Remarks. Chipmunks from the following localities agree well with the 

 Camp Thome specimen,* assumed to be typical : Montana: Painted Robe 

 Creek, Sage Creek (Big Horn Basin), Alzada, Powderville. Wyoming: 

 Powder River Basin, Merino, Moorcroft, Thornton, Newcastle, Douglas, 

 Big Horn Basin. Chipmunks from Fort Washakie and Wind River Basin 

 average somewhat smaller, but agree in coloration ; while others from the 

 Pine Ridge country of northwestern Nebraska ( Warbonnet Canyon and 

 Glen, Sioux County, Coll. Univ. of Nebr.) are intermediate in colora 

 tion between typical E. pallidus and the pale Bad Lands form which is 

 described later in the present paper. The much larger size and longer tail 

 of pallidus serve at once to distinguish it from the small minimus. Inter- 

 gradation can not be shown from present material and with such a dis 

 crepancy in size it seems best to give pallidus full specific rank. Green 

 River City, Wyoming, has been commonly accepted as the type locality of 

 minimus^ but Townsend's Narrative J seems to place it considerably north 

 of that point, and not far from the mouth of Big Sandy Creek. 



In the original description of E. pallidus (1. c.), Doctor Allen gave its 

 habitat as " The Great Plains, and the desert region generally of the inte 

 rior of the continent." In a footnote it is characterized as " The small, 

 pale form of the high, dry plains of the interior." No type specimen was 

 designated, nor was a type locality assigned. In a later paper,$ however, 

 Doctor Allen gave a more detailed characterization, and remarked (p. 796) 

 tlrdi pallidus " Reaches an extreme phase of specialization in the Yellowstone 

 region in respect to both pallor and smallness of size. He still further re 

 stricted pallidus to the Yellowstone region by the following words (p. 800) : 

 "typical pallidus (from the Yellowstone Plains)." Among the specimens 

 listed by Doctor Allen were three taken by himself at Camp Thome, Yel 

 lowstone River, July 18, 1 873. These are the only specimens from a definite 

 locality in the Yellowstone region which he considered "very pale." As 

 one of the above specimens (No. 11,656,17. S. N. M.) is still extant, and in a 

 good state of preservation, it seems best to consider Camp Thome the type 

 locality. 



*The site of Camp Thome is near the present town of Glendive, Montana. 

 fCf. Allen, Bull. Am. Mas. Nat. Hist., Ill, p. 112, 1890. 

 JNarr. Journey across Rocky Mts., etc., p. 72, 1839. 

 I Moil. N. Am. Roden, p. 795, 1877. 



