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define accurately the subspecies and their ranges. Peters (1954:29) assigned the specimens from Coalcoman to _R. h. hesperioides_. In life the specimens from Arteaga had bright cream-colored temporal stripes and dorsolateral stripes on the anterior part of the body. The chin and anterior one-sixth of the belly was white; posteriorly the venter was bright orange-red. In Michoacan this snake has been found in tropical semi-deciduous forest, arid scrub forest, and pine-oak forest at elevations from 850 to 1500 meters. ~Rhadinaea laureata~ (Guenther) _Dromicus laureatus_ Guenther, Ann. Mag. Nat. Hist., ser. 4, 1:419, 1868.--Mexico City. _Rhadinaea laureata_, Boulenger, Catalogue Snakes... British Museum, 2, p. 179, September 23, 1894. Capacuaro; Carapan (8); Cheran (3); Paracho (2); Patzcuaro; Tancitaro (10). This snake is abundant in the Cordillera Volcanica, but it is unknown in the mountains to the northeast of Morelia or in the Sierra de Coalcoman. Most specimens were found beneath volcanic rocks imbedded in the ashy soil in pine forest between 1800 and 2300 meters. ~Rhadinaea taeniata~ (Peters) _Dromicus taeniatus_ Peters, Monats. Akad. Wiss. Berlin, p. 275, 1863.--Mexico. _Rhadinaea taeniata_, Bailey, Occ. Pap. Mus. Zool. Univ. Michigan, 412:14, May 6, 1940. Tancitaro (2). This species, which is known only from a small region in the mountains of Jalisco and central Michoacan, is represented by two specimens (CNHM 37130 and 39030) collected at Tancitaro (see Schmidt and Shannon, 1947:80). ~Salvadora bairdi~ Jan _Salvadora Bairdii_ Jan. Icon. gener. ophid., livr. 2, pl. 3, fig. 2, 1860.--Mexico. Type locality restricted to Acambaro, Guanajuato, Mexico, by Smith and Taylor (1950a:330). Barranca Seca; Carapan; Cerro San Andres; Cojumatlan (2); Jiquilpan; Morelia; Patzcuaro (4); Quiroga; Sahuayo (2); Tacicuaro (12); Tancitaro (56); Uruapan (2); Zacapu (2); between Zitacuaro and Tuxpan (3). This species is abundant on the Mexican plateau, where it inhabits the more grassy areas in the mesquite grassland and cutover land in the pine forests from 1550 to 2500 meters. Davis and Dixon (1957:21) described a specimen from Zacapu as having two dark paravertebral stripes diverging on the temporals and extending through the eye onto the loreal, a characteristic of _Salvadora lineata_. On the ba
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