Osgood — Two New Spermophiles from Alaska. 27 



chiefly ochraceous, including chest, belly, forelegs, sides of face and 

 neck; underside of tail tawny margined with buff and submargined 

 with black for its distal half; forehead and crown mars brown; back 

 nape, rump, etc. uniformly and closely spotted with creamy white 

 quadrate spots on a ground of mixed black and russet. 



Skull. — Similar to that of C. kodiacensis but smaller and lighter; molar 

 teeth actually about as in kodiacensis, decidedly smaller than in ablusus; 

 nasals rather narrow and elevated along the median suture as in kodia- 

 censis; basioccipital much narrower; audital bullae higher and fuller; 

 braincase narrower. 



Measurements.— Type (dry skin): Total length, 340; tail vertebra*, 82; 

 hind foot, 53. Skull of type: Basilar length of Hensel, 42; occipito-nasal 

 length, 49; zygomatic breadth, 32; length of nasals, 18; alveolar length of 

 molar series, 12. 



Remarks. — The small series of five specimens of C. nebulicola which I 

 have seen contains but one skin in good pelage and this is unaccompanied 

 by a skull. The others, including the type, are rather worn and unsat- 

 isfactory for comparison but are paler than kodiacensis in similar worn 

 condition. The one skin showing fresh pelage is in a very ochraceous 

 phase and shows much less mixture of blackish than kodiacensis in the 

 same phase or stage of pelage. It is probable then that nebulicola 

 will prove to be well characterized as far as color is concerned, at 

 least in contrast with kodiacensis. The northern spermophiles of this 

 group may be subdivided into two groups, one containing the large long- 

 tailed forms with heavier teeth — parryi, barrowensis, and osgoodi — and 

 another containing the smaller shorter-tailed forms with lighter teeth — 

 plesius, ablusus, kodiacensis, and nebulicola. In the second group kodia- 

 censis and nebulicola fall together on account of their smaller molar 

 teeth as contrasted with plesius and ablusus. According to reports which 

 I received from natives at Kodiak, the spermophiles were first brought 

 there some years ago from North Semidi Island which lies a short dis- 

 tance west of Kodiak and between Kodiak and the Shumagin Islands. 

 The relationship shown between C. kodiacensis and C. nebulicola is thus 

 quite in accordance with their geographic positions. 



