May, 1896. Sundry Collections of Mammals — Elliot. 81 



from heel to end of toes 3^ inches. Arm from elbow to end of claw 

 5' _■ inches. Tail from root to end of hairs 1 3 ' _> inches. Ear, height 

 posteriorly two inches, width one inch. 



The young resembles the adult but is generally darker on the 

 back, and without any bands across the chest, this part being pure 

 white. The upper median line of the tail, and the tip, are jet black, 

 without any of the brownish tinge seen in the adult. 



This sub-species, besides being very much smaller in all its 

 measurements than typical U. cinereo-argentatus, is easily recog- 

 nizable by the very much darker coloring of the upper parts, and the 

 type presents but little of the rich rufous coloration so conspicuous 

 in the well-known species. The back of the ears is also very differ- 

 ently colored, the dark fulvous being confined to the base. 



An example, apparently, of this sub-species, in the New York 

 American Museum of Natural History, from Santo Domingo. Tehuan- 

 tepec, collected by Dr. Buller, is even darker than the above 

 described type, and also somewhat larger. The sides of the neck 

 and under parts are dark fulvous, more like typical foxes from the 

 northern part of the United States. The back is very dark, almost 

 black. It was procured in April, and probably exhibits the full 

 pelage of winter to better advantage than the type of the sub-species 

 which was obtained nearly two months later in the year. The flanks 

 of the Tehuantepec specimen are deep buff mixed with gray, which 

 hue on this part, is absent in the Yucatan example. 



These individuals represent a well-marked race, of darker pelage 

 and smaller size than the other described forms, andftare easily to be 

 distinguished. 



