_Arizona lineaticollis_ Cope, Proc. Acad. Nat. Sci. Philadelphia, 13:300, December 28, 1861.--Southern Mexican Plateau. Type locality restricted to 24 kilometers northwest of Oaxaca, Oaxaca, México, by Duellman (1960b:607). _Pituophis lineaticollis lineaticollis_, Duellman, Univ. Kansas Publ. Mus. Nat. Hist., 10:607, May 2, 1960. Acuaro de las Lleguas; Dos Aguas (3); Morelia; Tancítaro (5). This species reaches the northern limits of its range in the Sierra de Coalcomán and on the Mexican Plateau in Michoacán. On the plateau it has been collected in mesquite grassland at elevations between 1500 and 2000 meters. In the Sierra de Coalcomán individuals were found in open pine-oak forest at 2100 meters elevation and in a meadow surrounded by pine-oak forest at 2300 meters. ~Pseudoficimia frontalis~ (Cope) _Toluca frontalis_ Cope, Proc. Acad. Nat. Sci. Philadelphia, 16:167, September 30, 1864.--Colima, Colima, México. _Pseudoficimia frontalis_, Günther, Biologia Centrali-Americana, Reptilia, p. 96, May, 1893. Apatzingán; Coalcomán (6); El Sabino (2). Most specimens were found beneath rocks in grassy areas near the upper limits of the arid scrub forest, both in the Sierra de Coalcomán and on the southern slopes of the Cordillera Volcánica; all are from elevations of less than 1100 meters. One specimen was found on a road at night near Apatzingán. This species has been found in similar habitats near Huajintlán, Guerrero, and in arid scrub forest at lower elevations in Colima. It is unknown from the coast of Michoacán. ~Pseudoficimia pulcherrima~ Taylor and Smith _Pseudoficimia pulcherrima_ Taylor and Smith, Univ. Kansas Sci. Bull., 28:246, May 15, 1942.--Huajintlán, Guerrero, México. Apatzingán. This specimen (CNHM 39208) was reported by Schmidt and Shannon (1947:81); they stated that it was a paratype of _P. pulcherrima_. However, Taylor and Smith (1942a:246) did not mention the specimen; aside from the type (EHT-HMS 5497), the only other specimen they designated as belonging to the type series was UMMZ 85711 from Chilpancingo, Guerrero. The taxonomic validity of _Pseudoficimia pulcherrima_ remains doubtful, for only minor characters distinguish it from _P. frontalis_. Furthermore, all known specimens of _P. pulcherrima_ are from within the geographic range of _P. frontalis_. ~Rhadinaea hesperia hesperia~ Bailey _Rhadinaea hesperia_ Bailey, Occ. Pap. Mus. Zool. Univ. Michigan, 412:8, May 6, 1940.--Omilteme and Sierra de Burro, Guerrero. Type locality restricted to Omilteme, Guerrero, México, by Smith and Taylor (1950a:332). _Rhadinaea hesperia hesperia_, Smith, Proc. Biol. Soc. Washington, 55:185, December 31, 1942. Arteaga (3); Coalcomán; El Sabino (2); Uruapan; Volcán Jorullo (2).