New Squirrels from Mexico and Central America. 151 



Distribution. The pine and oak forests on mountains along western side 

 of Valley of Oaxaca, Oaxaca, Mexico. 



Characters. Size of S. albipes, but differs in having the back grizzled 

 yellowish-gray, and the lower surface white or sometimes pale buffy. 2 

 upper premolars. 



Color. Very similar to S. albipes nemoralis from mountains near Patz- 

 cuaro, Michoacan, but differing in paler, more yellowish-white dorsal 

 surface ; median band on under side of tail commonly buffy or reddish 

 fulvous, bordered with the usual black band edged externally with white. 

 No melanistic phase. 



Measurements. Type specimen : Total length 550 ; tail vertebrae 285 ; 

 hind foot 70. Average of five adults : Total length 545.6; tail vertebrae 

 274.8; hind foot 69.8. 



Remarks. Some specimens are very close to S. albipes nemoralis and 

 have the under side of tail nearly as gray as in that form. The feet and 

 under parts are usually white, varying to buffy or fulvous on one out of 

 every 4 or 5 specimens. This is not a strongly defined race, but the char 

 acters given are sufficient to distinguish most specimens without difficulty, 

 and in view of its isolation from its nearest related form it appears worthy 

 of recognition. 



Sciurus albipes nemoralis subsp. nov. Michoacan Squirrel. 



Type from Patzcuaro, Michoacan, Mexico. No. |f||f, c? ad., U. S. 

 Nat. Mus., Biological Survey Coll. Collected July 23, 1892, by E. W. 

 Nelson and E. A. Goldman. Orig. No. 2905. 



Distribution. Sierra Mad re, southeast of the Sierra Nevada de Colima, 

 Jalisco, to Volcano of Toluca, State of Mexico (Nahautzin and Patzcuaro, 

 Michoacan and Volcano of Toluca). 



Characters. Size of S. albipes, but differs in having back of a clearer 

 iron-gray ; lower surface white ; under side of tail gray or fulvous-gray. 

 2 upper premolars. 



Color. Top of nose and crown blackish or dark iron-gray, rest of dorsal 

 surface, including outside of fore and hind legs, grizzled black, gray, or 

 grayish white with an indistinct mixture of dingy fulvous; the fulvous 

 mixture darkest on nape and rump, forming poorly defined patches vary 

 ing in intensity and sometimes scarcely appreciable ; outside of legs and 

 flanks grayer than middle of back ; feet white ; ears like crown, with 

 conspicuous white patch behind base ; eyes surrounded by dull grayish- 

 fulvous ring; cheeks and sides of nose grizzled gray with dingy fulvous 

 shade ; lower surface of body white. Base of tail, above like rump, below 

 grizzled gray ; rest of upper surface black, heavily washed with white ; 

 lower surface with broad median band of grizzled gray or pale fulvous- 

 gray and black, bordered by a band of black and edged externally with 

 white ; on some specimens the lower surface of tail is washed with white. 



Measurements. Type specimen: Total length 560; tail vertebras 295; 

 hind foot 70. Average of 5 adults: Total length 550.6; tail vertebras 

 280.6 ; hind foot 70. 



