Vol. XXVIII, pp. 133-138 June 29, 1915 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



FIVE NEW MAMMALS FROM MEXICO AND ARIZONA. 



BY E. A. GOLDMAN. 



The following descriptions of hitherto unrecognized forms of 

 mammals in the collection of the Biological Survey are based 

 in part on material gathered by E. W. Nelson and myself, 

 mainly in Mexico. One of the woodrats was included in a 

 collection of mammals made by Charles Sheldon during a 

 recent visit to the state of Sonora, Mexico, 



Potos flavus guerrerensis subsp. nov. 



GUERRERO KINKAJOU. 



Type from near Ometepec, Guerrero, Mexico. No. 74,683, male adult, 

 U. S. National Museum (Biological Survey Collection), collected by 

 E. W. Nelson, and E. A. Goldman, February 15, 1895. Original number 

 7464. 



General characters. — Size and color about as in P. f. aztecus; skull less 

 elongated, the rostrum and frontal region relatively broad ; audital bullae 

 more fully inflated, rounded and bulging conspicuously below basiocci- 

 pital, instead of flattened as in all of its known relatives in Middle 

 America. 



Color. — Type: Upperparts near clay color (Ridgway, 1912), somewhat 

 suflFused with ochraceous-tawny, especially on neck, the top of head and 

 back darkened by brownish-tipped hairs; underparts, Including inner 

 sides of limbs and under side of tail cinnamon-buffy, this color darkest 

 across abdomen and becoming clay color along the sides ; outer sides of 

 limbs and feet to base of toes similar to back, the toes more brownish. 

 Another specimen, an adult male, is richer, more ochraceous-tawny in 

 color, with an elongated dark brown patch on the median line of the 

 abdomen ; also present in some specimens of other forms of the group. 



Skull. — Similar to that of P. f. aztecus, but less elongated, the rostrum 

 and frontal region relatively broad ; basioccipital narrower and less dis- 

 tinctly ridged along median line; audital bullae more inflated, projecting 



26— Pkoc. Biol. Soc. Wash.. Vol. XXVIII. 1915. C133) 



