evision of ilic ( 



rostrum, smaller upper carnassial, and more emarginate first upper molar. 

 Externally it differs from mearnsi conspicuously, the upper parts being 

 darker and the fulvous tints deeper, duller, and less extensive. In mefi>*i 

 the whole of the legs and feet are bright orange-fulvous. In microdon the 

 white of the under parts reaches down on the inner side of the legs all 

 the way to the wrists and ankles, and the upper surface of the hind feet 

 is white. 



Canis microdon is distantly related to C. rigilis, of the south west coast of 

 Mexico, but it differs from rigilis in numerous and important characters. 

 The palate is shorter and broader, and the carnassial and molar teeth of 

 the male are about the size of those of the female rig-Ufa. The external 

 differences are even more marked. The sides of the face lack the con 

 spicuous black hairs of rigilis ; the under fur of the back is buffy or pale 

 buffy-ochraceous instead of fulvous; the belly is white and buffy, abun 

 dantly mixed with black-tipped hairs instead of everywhere saturated 

 with fulvous; the fulvous of the fore and hind legs is pale and less ex 

 tensive ; the black of the forearm less extensive ; the color of the hind 

 legs and feet entirely different : the outer side only of the hind leg is ful 

 vous, the inner side being white and the upper surface of the hind foot 

 white or whitish. In vigilis the hind legs and feet are deep fulvous all 

 round. The hairs of the distal half of the tail are broadly tipped with 

 black, while in rigilis they are fulvous throughout. 



Measurements. Type specimen, $ adult: total length, 1070; tail ver 

 tebrae, 320; hind foot, 186; weight, 28 pounds. 



Cranial measurements. Basal length, 161 ; basilar length of Hensel, 158; 

 zygornatic breadth, 93.5 ; palatal length, 84 ; mastoid breadth, 57 ; length 

 of crown of upper carnassial tooth, 16.5. 



Type locality. Quitobaquita, Pima County, Arizona. No. 59899, tf 

 young adult, U. S. National Museum. Collected February 5, 1894, by Dr. 

 Edgar A. Mearns. Original No. 2925. 



ClmriM'lt'i'x. Size small; ears medium ; coloration rich and bright, the 

 fulvous tints exceedingly bright and covering the whole of the fore and 

 hind legs and feet. Skull and teeth small. 



Color. Muzzle cinnamon rufous ; space between eyes grizzled grayish 

 and fulvous; top of head, nape, and ears rather light fulvous; rest of 

 upper parts buffy-ochraceous bountifully mixed with black-tipped hairs 

 (under fur bright buffy-ochraceous) ; under parts in pectoral and inguinal 

 regions whitish, middle part of belly suffused all the way across with 

 buffy-ochraceous; throat huffy, the long hairs black-tipped; fore and 

 hind legs and feet bright orange-fulvous all round ; upper side of fore 



* Named in honor of Dr. Edgar A. Mearns, U. S. A., whose name will 

 always be associated with the mammals of the Mexican boundary, and 

 through whose courtesy I am indebted for the opportunity of describing 

 the species. 



