CITELLUS. 109 



1900, p. 29. Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 

 II, 1901, Append., p. 427. Zool. Ser. 

 Osgood's Spermophile. 



Type locality. Bennett City, Lake Bennett, British Columbia, 

 Canada. 



Geogr. Distr. South Side of White Pass to Fort Selkirk. Alaska. 



a. Citcllus plesius tdilusiis Osgood. 



Citellns plesiiis ablnsus Osgood, Proc. Biol. Soc. Wash., xvi, 

 1903. P- 25- 



NUSHAGAK SpER.MOPHILE. 



Type locality. Xushagak, Alaska. 



Ge)d. Char. Similar to C. plesiiis, but larger. Skull larger, 

 nasals longer, narrower, and more restricted posteriorly ; molars about 

 the size of those of C. plesius. 



Color. Forehead and crown burnt umber; sides of head, nape, 

 shoulders and neck pale gray, blackish slate under fur showing through 

 in places; orbital ring and subauricular spot white; middle of back 

 and rump Vandyke brown spotted with grayish white; under parts 

 dull grayish white; tail beneath tawny in center, lateral hairs with 

 three or four dusky rings and grayish white tip; pencil with black 

 subterminal section, then one or two narrow dusky rings; tip white; 

 hands and feet creamy white. 



Measitremeuis. Total length, 394; tail vertebrse, 103; hind foot, 

 60. Skull: Hensel, 49; occipito-nasal length. 57.5; zygomatic breadth, 

 38; length of nasals, alveolar border, 13.3. 



211. Citellus nebulicola Osgood. 



Citellns nebulicola Osgood, Proc. Biol. Soc. Wash., xvi. 1903, p. 

 -26. 

 Nagai Island Spermophile. 



Type locality. Xagai Island, Shumagin Islands, Alaska. 



Genl. Char. Similar to C. p. ^aJzat-6';/5i5, but smaller; tail shorter, 

 paler. Skull:- small; basi-occipital narrower; audital bullae higher; 

 braincase narrower. 



Color. Similar to C . p. kadiacensis , but paler; tail with less black; 

 under parts ochraceous, as are also the arms, neck, and face; tail 

 beneath, tawny margined with buff and submargined with black 

 for distal half; forehead and crown mars brown; upper parts mixed 

 black and russet spotted with creamv white. 



Measurements. Total length, 340; tail vertebrae, 82; hind foot, 

 53. Skull: Hensel, 42; occipito-nasal length, 49; zygomatic width, 

 32; length of nasals, 18; upper molar series, alveolar border, 12. 



