August, 1910. MAMMALS FROM SOUTH AMERICA OSGOOD. 27 



black with a light punctulate mixture of tawny ochraceous ; feet, toes, 

 and upper side of forelegs clear, rich ferruginous; underparts clear 

 ferruginous with or without irregular white markings on the throat 

 and chest; chin and sides of throat finely mixed dusky and clay 

 color, only slightly paler than cheeks ; upper side of tail black proxi- 

 mally and terminally, the intervening part clear ferruginous (the hairs 

 of this part very narrowly or quite broadly black basally) ; terminal 

 black occupying nearly or quite one-third of length; under side of 

 tail black with a broad ferruginous edging in middle or black proxi- 

 mally and terminally with clear ferruginous or mixed black and ferru- 

 ginous in middle. 



Measurements. Type: Total length 440; head and body 235; 

 tail vertebrae 205; hind foot (s. u.) 57; ear 26. Skull of type: Great- 

 est length 68.3; basilar length 45.5; zygomatic breadth 33.6; inter- 

 orbital breadth 17.7; median length of nasals 18.8; diastema, 15.5; 

 crowns of upper toothrow 9.4. 



Remarks. This form, like typical versicolor, is doubtless highly 

 variable, but the three specimens examined differ constantly from any 

 of a considerable series of typical versicolor in at least three characters, 

 increased black across the shoulders and nape, increased black on the 

 end of the tail, and decrease or entire absence of black on the feet and 

 forelegs. In versicolor, there is only an inch of terminal black in the tail at 

 the most and many specimens have the tail ferruginous to the very tip; 

 while in zulics the terminal black amounts to as much as three inches. 

 The only other form likely to be related is Sciurus variahilis morulus 

 of Panama, which is said to have "most of the hairs above, 

 ringed-blackish at base, then ferruginous, and blackish again at tip"; 

 .'hereas, in zulice the hairs of the back are pure black to the roots. 



:iurus tobagensis sp. nov. 



Type from Tobago Island, Caribbean Sea. No. 14,954 Field Mu- 

 seum of Natural History. Adult female. Collected May 12, 1892, by 

 T . W. Brown, Jr. 



Characters. Similar to Sciurus chapmani, with which it agrees 

 in size and general coloration, but terminal color of hairs of tail paler 

 md subterminal black more extensive; sides of face slightly more 

 richly colored. Color of tail much as in S. hoffmanni, but size de- 

 cidedly smaller. The subterminal black in the hairs of the tail forms 

 well-defined lateral stripe about 5 mm. in width extending the 

 length of the tail to a broad black tip 25 to 50 mm. in width. In chap- 

 ini, the black lateral stripe and subapical black is much reduced 



