Smith and Taylor (1950b:168) Listed this species: "Michoacán: No specific record." I am unaware of any specimen of this skink from the state. As presently recognized, this species contains two subspecies. One of these occurs in the mountains of Oaxaca northward into central Veracruz; the other, Eumeces brevirostris bilineatus, occurs in Durango southward to Jalisco, where it inhabits the Sierra Madre Occidental. Possibly the species occurs in the Sierra de los Tarascos in Michoacán.
Eumeces callicephalus Bocourt
Eumeces callacephalus Bocourt, Mission scientifique au Mexique et dans l'Amerique Céntrale. Reptiles, livr. 6, p. 431, 1879.—Guanajuato, Guanajuato, México.
Dugés (1896) in a paper in which he listed several species of Eumeces in México, reported Eumeces callicephalus from Michoacán, but he gave no specific locality within the state. Michoacán was included in the range of the species by Taylor (1936:298) and by Smith and Taylor (1950b:164). The species definitely is known from southeastern Arizona southward to Guanajuato. It may occur in Michoacán, but, since there are three rather widespread species of Eumeces inhabiting the Mexican Plateau and associated mountain ranges in the northern and northeastern part of Michoacán, interspecific competition might be a reason for the absence of Eumeces callicephalus there.
Leptodeira septentrionalis polysticta Günther
Leptodeira polysticta Günther, Biologia Centrali-Americana, Reptilia, p. 172, May, 1895.—Belice, British Honduras.
Leptodeira septentrionalis polysticta, Duellman, Bull. Amer. Mus. Nat. Hist., 114:72, February 24, 1958.
Although this species occurs from sea level to elevations of about 2000 meters from Nayarit southward into Central America, no specimens are known from Michoacán. Smith and Taylor (1945:87) listed the species as occurring in Michoacán, but they had no record on which to base this report. Probably, the species occurs on the coastal lowlands and seaward slopes of the Sierra de Coalcomán.
Tropidodipsas fasciata guerreroensis Taylor
Tropidodipsas guerreroensis Taylor, Univ. Kansas Sci. Bull., 26:470; November 27, 1940.—Buena Vista, Guerrero, México.