At the present time this species is known definitely from only three localities on the Mexican Plateau in Michoacán. An incomplete skin from El Sabino (EHT-HMS 5438) was referred to this species by Taylor (1940c:465); the specimen cannot be found, so verification of the identification cannot be made at this time. ~Leptodeira latifasciata~ (Günther) _Hypsiglena latifasciata_ Günther, Biologia Centrali-Americana, Reptilia, p. 138, October, 1894.--Southern México. Type locality restricted to Huajintlán, Morelos, México, by Smith and Taylor (1950a:331). _Leptodeira latifasciata_, Dunn, Proc. Natl. Acad. Sci., 22:696, December, 1936. Apatzingán; El Sabino; La Playa; 32 km. E of Nueva Italia. This nocturnal snake apparently ranges throughout the arid Balsas-Tepalcatepec Valley to elevations of about 1050 meters. It has been collected only in the arid scrub forest. Aside from the specimens listed by Duellman (1958a:93), there is one (UMMZ 120223) having eight body blotches, a body length of 510 mm. and a tail length of 103 mm. ~Leptodeira maculata~ (Hallowell) _Megalops maculatus_ Hallowell, Proc. Acad. Nat. Sci. Philadelphia, 13:488, March 31, 1862.--"Tahiti." Type locality restricted to Manzanillo, Colima, México, by Duellman (1958a:54). _Leptodeira maculata_, Duellman, Bull. Amer. Mus. Nat. Hist., 114:53, February 24, 1958. Aguililla (2); Apatzingán (24); Arteaga (2); Capirio (3); Charapendo (2); Coahuayana (3); Cofradía; Cuatro Caminos; La Placita (3); Lombardia (69); Nueva Italia (29); Pómaro; Río Marquez, 10 km. S of Lombardia (2); Salitre de Estopila; Tafetan (2); Volcán Jorullo. This snake is abundant in the arid Tepalcatepec Valley; most of the specimens have been collected in arid scrub forest at elevations of less than 500 meters. With the onset of the rains in late June and early July, large numbers of these snakes can be found around temporary pools, where they feed on small frogs and toads. In the dry season few individuals were found, and all of those were beneath cover. Specimens from the coast have more body-blotches than do those from the Tepalcatepec Valley (Duellman, 1958a:56); otherwise the snakes show little variation. ~Leptodeira splendida bressoni~ Taylor _Leptodeira bressoni_ Taylor, Univ. Kansas Sci. Bull., 25:321, July 10, 1939.--Hacienda El Sabino, Michoacán, México. _Leptodeira splendida bressoni_, Duellman, Bull. Amer. Mus. Nat. Hist., 114:84, February 24, 1958. Coalcomán (3); El Sabino (3); Uruapan (5).