Three specimens were examined. One is a pup from the vicinity of Padilla which is assigned to this subspecies on geographic grounds. The other two are skins, collected at Nicolás by natives, who deceived the collector by providing dog skulls with the coyote skins. These two specimens are referred to _C. l. microdon_ on the basis of their dark color and dusky shading on the throat and chest. One has a rufous over-all color and the other is ochraceous yellowish. This difference in color suggests intergradation at this place between _C. l. microdon_ that ranged to the northeast, _C. l. cagottis_ to the south, and probably with _C. l. impavidus_ distributed to the west. _Records of occurrence._--Specimens examined, 3: 9-1/2 mi. SW Padilla, 800 ft., 1; Nicolás, 53 km. N Tula, 2. Additional record: Camargo (Jackson, 1951:305); 20 mi. W Reynosa (Ingles, 1959:401); Matamoros (Jackson, 1951:305); Bagdad (_ibid._); Sierra San Carlos (San Miguel, El Mulato) (Dice, 1937:251). =Canis latrans texensis= V. Bailey 1905. _Canis nebrascensis texensis_ V. Bailey, N. Amer. Fauna, 25:175, October 24, type from 45 mi. SW Corpus Christi at Santa Gertrudis, Kleberg Co., Texas. 1932. _Canis latrans texensis_ V. Bailey, N. Amer. Fauna, 53:312, March 11. _Distribution in Tamaulipas._--Extreme northwest, known only from Nuevo Laredo (Jackson, 1951:279). =Canis lupus monstrabilis= Goldman Gray Wolf 1937. _Canis lupus monstrabilis_ Goldman, Jour. Mamm., 18:42, February 11, type from 10 mi. S Rankin, Upton Co., Texas. _Distribution in Tamaulipas._--Probably extinct, recorded only from Matamoros (Goldman, 1944:468). On the maps of distribution of _C. l. monstrabilis_ published by Leopold (1959:400) and Baker and Villa (1960:370), Tamaulipas is included in the region in which the wolf is considered to be extinct. =Urocyon cineroargenteus scottii= Mearns Gray Fox 1891. _Urocyon virginianus scottii_ Mearns, Bull. Amer. Mus. Nat. Hist., 3:236, June 5, type from Pinal Co., Arizona. 1895. _Urocyon cinereo-argenteus scottii_, J. A. Allen, Bull. Amer. Mus. Nat. Hist., 7:253, June. _Distribution in Tamaulipas._--All of state in suitable habitats. The specimen from the Sierra Madre Oriental was obtained by a collector who used a rabbit call. Leopold (1959:408) reported that the highest elevation [about 2800 feet] at which he found gray fox in México was at Hacienda de Acuña, in the Sierra de Tamaulipas, where "dense, brushy draws and oak openings made ideal habitat." At this place Leopold saw, in early August, a family of foxes, four well-grown young and their parents. Dice (1937:250) reported _U. c. texensis_ (a junior synonym of _U. c. scottii_), as abundant in the Sierra San Carlos.