The six specimens examined do not present any significant difference in size and shape of the skull from specimens of _scottii_ from Arizona, except that one skull from the Sierra de Tamaulipas is smaller than the others, suggesting intergradation between the subspecies _scottii_ and _tropicalis_ from farther south. _Records of occurrence._--Specimens examined, 6: 2 mi. W San Fernando, 180 ft., 1; 15 km. W Rancho Santa Rosa, Sierra Madre Oriental, 4500 ft., 1; Ejido Santa Isabel, 2000 ft., 1; Sierra de Tamaulipas, 2 mi. S, 10 mi. W Piedra, 1200 ft., 2; Joya Verde, 35 km. SW Victoria, 3800 ft., 1. Additional records: Near Marmolejo, San Carlos Mts. (Dice, 1937:250); Hacienda Acuña, Sierra de Tamaulipas (Leopold, 1959:408, only seen); La Joya de Salas (Goodwin, 1954:14). =Ursus americanus eremicus= Merriam Black Bear 1904. _Ursus americanus eremicus_ Merriam, Proc. Biol. Soc. Washington, 17:154, October 6, type from Sierra Guadalupe, Coahuila. _Distribution in Tamaulipas._--Probably in high and remote parts of the Sierra Madre Oriental; recorded only from Agua Linda (Goodwin, 1954:14). =Bassariscus astutus flavus= Rhoads Ringtail 1894. _Bassariscus astutus flavus_ Rhoads, Proc. Acad. Nat. Sci. Philadelphia, 45:417, January 30, type from Texas, exact locality unknown. _Distribution in Tamaulipas._--Western half of state. The two specimens examined provide the second record of this species in Tamaulipas; they were shot in the bottom of an arid canyon. One animal was about 30 feet up from the ground in an oak tree, and the other was along a small arroyo containing pools of water. From Rhoads' paper (1893:416-417) on the genus _Bassariscus_ it would seem that _B. astutus flavus_ differs from _B. a. astutus_ in smaller size, especially of the skull, shorter tail (shorter than head and body in _flavus_ and longer than head and body in _astutus_) and the presence of fulvous color. Comparison of 10 specimens of _B. a. flavus_ from Coahuila and Texas with two of _B. a. astutus_ (Distrito Federal, 1; Las Vigas, Veracruz, 1) from central México reveals that the skulls do not differ qualitatively and that the skull of _flavus_ tends to be smaller and relatively wider, but that there is overlap in size. In all _flavus_ that I measured and in the two adults of _astutus_ the tail is shorter than the head and body. The only real difference is the color; ringtails from Texas are deep fulvous instead of grayish as is _astutus_ from the Distrito Federal and Veracruz. But the specimen from Veracruz has much fulvous and on the other hand specimens from Coahuila are more grayish than those from Texas. The two specimens from Tamaulipas can be assigned to either subspecies _astutus_ or _flavus_ with almost equal propriety. Here they are referred to _B. a. flavus_ on the basis of their relatively small skull, short tail, and presence of some fulvous color.