Bogert and Oliver (1945:379) discussed the status of certain named populations in Baja California and concluded that only one species occurs there, and that the species probably is conspecific with _H. torquata_. A careful review of the genus _Hypsiglena_ might show that there is only one species. The one specimen from Michoacán (USNM 46513) is from an elevation of about 2300 meters near the southern edge of the Mexican Plateau. ~Hypsiglena torquata torquata~ (Günther) _Leptodeira torquata_ Günther, Ann. Mag. Nat. Hist., ser. 3, 5:170.--Laguna Island, Nicaragua (in error). _Hypsiglena torquata torquata_, Taylor, Univ. Kansas Sci. Bull., 25:371, July 10, 1939. Apatzingán; Capirio; Cofradía. Specimens from the three mentioned localities have the dark nuchal spot bordered anteriorly by a pale blotch. In life the specimen from Capirio (UMMZ 114424) had rich reddish brown dorsal spots; the dorsal ground color was grayish white above and somewhat more gray laterally. The pale nuchal area was a cream-color, and the iris was grayish red. All of the specimens were found in the arid scrub forest in the Tepalcatepec Valley at elevations between 200 and 350 meters. ~Imantodes gemmistratus gracillimus~ (Günther) _Dipsas gracillima_ Günther, Biol. Centrali-Americana, Rept., p. 177, July, 1895.--southern México. Type locality restricted to Acapulco, Guerrero, México, by Smith and Taylor (1950a:331). _Imantodes gemmistratus gracillimus_, Zweifel, Amer. Mus. Novitates, 1961:12, September 16, 1959. La Orilla. 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.