This species belongs to a group containing two other populations that are currently recognized as species--_calcitrans_, known only from Omiltemi, Guerrero, and _mexicanus_, reported from the mountains of Oaxaca. Another apparently undescribed member of this group has been collected in the mountains of northern Puebla. The locality records indicate that the group inhabits the mountains on the periphery of the Mexican Plateau, except in western México, where _Eleutherodactylus occidentalis_ extends to the Pacific lowlands. ~Eleutherodactylus rugulosus vocalis~ Taylor _Eleutherodactylus vocalis_ Taylor, Univ. Kansas Sci. Bull., 26:401, November 27, 1940.--Hacienda El Sabino, Michoacán, México. Arteaga (10); El Sabino (8); Salitre de Estopilas (3); Tumbiscatio (2); Tzitzio (2). The distributional data on this frog in Michoacán indicate that it inhabits riparian situations in arroyos and canyons in the lower slopes of the Cordillera Volcánica and the Sierra de Coalcomán, where it has been taken at elevations only below 1100 meters. The dorsal color of living individuals from Arteaga varied from dark gray and olive brown to tan and reddish brown. The iris was grayish brown. In contrast, individuals from Agua del Obispo, Guerrero, had pale golden eyes; specimens from Matías Romero, Oaxaca, had gold eyes heavily flecked with gray; and individuals from Volcán San Martin, Veracruz, had bronze eyes. The use of the trinomial here is arbitrary. Frogs of the _Eleutherodactylus rugulosus_ group in México (_rugulosus_, _avocalis_, and _vocalis_) exhibit only slight differences in size, proportions, and coloration (Duellman, 1958c:6). Furthermore, the named populations are allopatric. _Eleutherodactylus rugulosus vocalis_, as defined by Duellman (_loc. cit._), occurs in the foothills of the Sierra Madre Occidental and associated ranges from central Sinaloa southward into Michoacán. ~Tomodactylus angustidigitorum~ Taylor _Tomadactylus angustidigitorum_ Taylor, Univ. Kansas Sci. Bull., 26:494, November 27, 1940.--Quiroga, Michoacán, México. Angahuan (6); Apo; Carapan (21); 19 km. S of Carapan (13); Cerro Tancítaro (12); Cherán; Corupu (14); Cuseño Station (14); Opopeo (3); Paracho (11); Parícutin (2); Pátzcuaro (3); Quiroga (59); San Juan de Parangaricutiro (16); Tancítaro (25); Uruapan (8); Zacapu (11). This species is indigenous to the pine-oak forests on the southern rim of the Mexican Plateau, and has been collected at elevations from 1500 to 2500 meters. Males have been observed to call from rocks, rock fences, clumps of grass, and low bushes; the call is a single "peep." At San Juan de Parangaricutiro numerous specimens were found in the daytime beneath adobe bricks and lava on the volcanic ash derived from Volcán Parícutin; at Paracho individuals were found by day beneath rocks in a pine forest.