The specimen from La Orilla was reported by Peters (1954:23) as Imantodes gemmistratus oliveri; Zweifel (1959c) showed that I. g. oliveri did not range west of Tehuantepec and that the snakes inhabiting the coastal lowlands of Guerrero, Michoacán, and Colima were assignable to the subspecies gracillimus. It may be assumed that this subspecies ranges throughout the coastal lowlands and foothills of the Sierra de Coalcomán.
Imantodes gemmistratus latistratus (Cope)
Dipsas gemmistrata latistrata Cope, Bull. U. S. Natl. Mus., 32:68, 1887.—Southern Jalisco. Type locality restricted to Guadalajara, Jalisco, México, by Smith and Taylor (1950a:334).
Imantodes gemmistratus latistratus, Zweifel, Amer. Mus. Novitates, 1961:3, September 16, 1959.
El Sabino.
The one specimen from Michoacán was collected near the upper limits of the scrub forest on the slopes of the Cordillera Volcánica. Zweifel (1959c:10) stated that in certain aspects of coloration this specimen was like I. gemmistratus gracillimus, but in scutellation and other features of coloration it was like I. g. latistratus. There are too few specimens of this species to define the ranges of the various subspecies with any degree of accuracy, but from the limited number of specimens available, it seems that I. gemmistratus gracillimus occurs on the Pacific lowlands from Guerrero northward to Colima. Northward on the Pacific lowlands from Colima to Sinaloa and in the Balsas-Tepalcatepec Basin is found I. gemmistratus latistratus.
Lampropeltis doliata (Linnaeus)
Coluber doliatus Linnaeus, Systema naturae, ed. 12, 1:379, 1766.—Charleston, South Carolina.
Lampropeltis doliata, Klauber, Copeia, No. 1:11, April 15, 1948.
Coalcomán (3); El Sabino; 24 km. W of Morelia; Río Nexpa; Uruapan.