1860. _R[eithrodon]. mexicanus_ Saussure, Revue et Mag. Zool., Paris, ser. 2, 12:109, type from mountains of Veracruz; restricted to Mirador, Veracruz, by Hooper, Miscl. Publ. Mus. Zool., Univ. Michigan, 77:140, January 16. 1914, _Reithrodontomys mexicanus mexicanus_, A. H. Howell, N. Amer. Fauna, 36:70, June 5. Not _Reithrodontomys mexicanus_ (Saussure), being instead of J. A. Allen, 1895:135, which in part equalled _Reithrodontomys fulvescens difficilis_. _Distribution in Tamaulipas._--Known from two localities, but probably occurs in all tropical areas in south part of state. As noted before, J. A. Allen (1891:223) reported specimens from Rancho Santa Rosa as _Ochetodon mexicanus_, but he used this name for the species now known as _R. fulvescens_. The specimen examined, previously reported by Jones and Anderson (1958:447), represents the northernmost occurrence of the species. _Records of occurrence._--One specimen examined from Rancho Pano Ayuctle, 6 mi. N Gómez Farías, 300 ft. Additional record: Rancho del Cielo, 3500 ft. (Hooper, 1952:144). =Peromyscus maniculatus blandus= Osgood Deer Mouse 1904. _Peromyscus sonoriensis blandus_ Osgood, Proc. Biol. Soc. Washington, 17:56, March 21, type from Escalón, Chihuahua. 1909. _Peromyscus maniculatus blandus_ Osgood, N. Amer. Fauna, 28:84, April 17. _Distribution in Tamaulipas._--Reported only from Miquihuana (Osgood, 1909:86). =Peromyscus melanotis= J. A. Allen and Chapman Black-eared Mouse 1897. _Peromyscus melanotis_ J. A. Allen and Chapman, Bull. Amer. Mus. Nat. Hist., 9:203, June 16, type from Las Vigas, Veracruz. _Distribution in Tamaulipas._--Known only from Miquihuana (Osgood, 1909:112). =Peromyscus leucopus texanus= (Woodhouse) White-footed Mouse 1853. _Hesperomys texana_ Woodhouse, Proc. Acad. Nat. Sci. Philadelphia, 6:242, type probably from vicinity of Mason, Mason Co., Texas. 1909. _Peromyscus leucopus texanus_, Osgood, N. Amer. Fauna, 28:127, April 17. _Distribution in Tamaulipas._--Over all of state.