48 FIELD MUSEUM or NATURAL HISTORY ZOOLOGY, VOL. X. 



tained there was shot from a coco palm and its stomach was well filled 

 with coconut. 



At Orope, the type locality of S. v. zulia, the climate is so much 

 more humid and the vegetation so much more luxuriant than at the 

 northern end of Lake Maracaibo, that considerable difference in the 

 animal life should obtain. However, it does not seem advisable at 

 present to attempt the separation of the squirrels of these regions. 

 Those from the more arid region have somewhat lighter heads, more 

 intensely ferruginous feet, and broader, more abundantly haired tails. 



Sciurus griseogena tamae subsp. nov. Tama Squirrel. 



Type from Paramo de Tama, Colombia. Alt. 6,000-7,000 ft. No. 

 18736 Field Museum of Natural History. Male adult. Collected 

 Feb. 14, 1911, by W. H. Osgood and S. G. Jewett. 



Characters. Similar to Sciurus g. meridensis, but paler colored 

 throughout; general color of upperparts only slightly darker than in 

 S. quebradensis, but more rufescent on shoulders; tail and other parts 

 quite different. Upper parts mixed clay color and blackish; shoulders 

 heavily suffused with ochraceous continuous with the same but slightly 

 heightened color on the outer sides of the forelegs; postauricular spot 

 cream buff bordered with ochraceous buff. Underparts bright tawny 

 ochraceous and white, the latter variable in extent, generally extending 

 medially from the throat to the groin, widening on the chest and extend- 

 ing to the forelegs; fore and hind feet tawny ochraceous, on the meta- 

 podials more or less mixed with dusky; upper side of tail about as in 

 S.g. meridensis, base (2 inches) grizzled, middle (4 inches) clear ochraceous 

 buff, tip (1^2 in.) black; under side of tail correspondingly colored but 

 middle part strongly mixed with blackish. 



Skull practically as in griseogena and meridensis; rostrum apparently 

 a trifle more attenuate. 



Measurements. Average of four topotypes: Total length 396 

 (385-416); head and body 216 (209-223); tail vertebras 180 (176-193); 

 hind foot (c. u.) 54 (53-55). Skull of type: Greatest length 53; basilar 

 length 39.3; zygomatic breadth 30.5; nasals 16.7; interorbital breadth 

 17; diastema 13; maxillary toothrow 8.6. 



Remarks. This form is most closely allied to Sciurus g. meridensis 

 but is well distinguished by its general lighter color and the extensive 

 white markings on the under parts. These white markings are variable, 

 but three of the four specimens taken have them highly developed. 



The extensive dense forests on the upper slopes of the Paramo de 

 Tama no doubt harbor considerable numbers of these squirrels, but in 



