152 Nelson New Squirrels from Mexico and Central America. 



Sciurus albipes colimensis stibsp. nov. Colima Squirrel. 



Type from the Hacienda Magdalena, Colima, Mexico. No. |H|, c? 

 ad., U. S. Nat. Mus., Biological Survey Coll. Collected March 19, 1892, 

 by E. W. Nelson and E. A. Goldman. Grig. No. 2239. 



Distribution. Arid tropical forests of Colima, ascending river valleys to 

 Plantinar, Jalisco. Ranging from sea level to 3000 feet. 



Characters. A little smaller, slenderer, and tail narrower than S. albiiw, 

 from which it differs in having distinct nape and rump patches ; rest of 

 back clearer and lighter gray ; tops of feet iron-gray ; under surface of 

 body white ; under surface of tail grizzled iron-gray. 2 upper premolars. 



Color. Upper surface, including tops of fore and hind feet, excepting 

 nape and rump patches, grizzled white or gray and black with a scanty 

 intermixture of rusty or buffy-rufous. Under fur tipped with gray or 

 fulvous according to color on longer hairs. Nose and fore part of crown 

 usually blacker than back ; ears similar to nape with patch of dingy 

 white behind base ; eyes surrounded with dingy whitish ring ; side of 

 nose and cheek to behind eyes gray, sometimes tinged with buffy on 

 cheeks. Tops of feet vary from dark iron-gray to grayish white. Nape 

 and rump patches generally very distinct, and vary from dark rufous to 

 bright rusty-red or dark reddish-buffy, and sometimes dull fulvous. 

 Lower surface of body white. Anal region and base of tail below like 

 middle of back ; top of tail at base like rump patch ; rest of upper surface 

 of tail black heavily washed with white; below a grizzled iron-gray 

 median band narrowly bordered by band of black and edged externally 

 with grayish white. Tail rather narrow. 



Measurements. Type specimen: Total length 525; tail vertebrae 260; 

 hind foot 65. Average of 5 adults : Total length 522 ; tail vertebrae 267 ; 

 hind foot 67.6. 



Sciurus albipes effugius subsp. nov. Guerrero Squirrel. 



Type from mountain near Chilpancingo, Guerrero, Mexico. No. 70288, 

 ? ad., U. S. Nat. Mus., Biological Survey Coll. Collected Dec. 24, 1894, 

 by E. W. Nelson and E. A. Goldman. Grig. No. 7271. 



Distribution. High pine region of the Cordillera del Sur, near Chilpan 

 cingo, Guerrero, Mexico. 



Characters. Size of S. albipes, from which it differs in the strongly 

 marked nape patch, unusually large, conspicuous patches of white behind 

 base of ear and rich rufous color on under side of tail. 2 upper pre 

 molars. 



Color. Winter pelage: Upper surface from nose to base of tail, except 

 ing nape patch and tops of fore and hind feet, grizzled grayish white, 

 black, and rufous, the latter color usually obscured by the overlying 

 grayish. Top of head and nape occupied by a well-marked patch of dark 

 rufous, almost chestnut, washed with black; nape patch shading into a 

 duller colored area extending below eyes on sides of head and neck and 

 surrounding ears; rump patch absent or reduced to small area at base of 



