My primary cartographic sources have been: the provisional edition of maps published by the American Geographic Society (Colima, Guadalajara, México, and San Luis Potosí sheets published between 1933 and 1940), scale 1:1,000,000; the preliminary sheets (Colima, Guadalajara, Guanajuato, and México) published in 1949 with a scale of 1:500,000 of the Carta Geográfica de la República Méxicana (Dirección de Geografía y Meterología, Secretaria de Agricultura y Ganadería); and the Carta de Cuenca Tepalcatepec (Scale 1:250,000) prepared in 1958 by the Comisión del Tepalcatepec, Secretaria de Recursos Hidráulicos. I have visited most of the 181 localities and have gathered data pertaining to vegetation, altitude, and location. I think, nevertheless, that the accuracy of some of the locations and elevations as given in the gazetteer is questionable. This situation can be rectified only by detailed geographic studies.
Most of the important towns, villages, rivers, and high mountains are shown on the accompanying map (Fig. 11). Places not shown on this map can be located from directions given in the gazetteer.
Acahuata.—Lat. 19° 10', long. 102° 21', elev. 1040 m. A village north of Apatzingán and on the southern slope of Cerro de Tancítaro; transition between arid tropical scrub forest and pine-oak forest; tropical semi-deciduous forest in barrancas.
Agua Cerca.—Lat. 19° 06', long. 101° 45', elev. 1550 m. A ranch south-southwest of Ario de Rosales on the road to La Huacana; pine-oak forest.
Aguililla.—Lat. 18° 45', long. 102° 47', elev. 860 m.; a town in a low valley in the Sierra de Coalcomán; arid tropical scrub forest.
Álamo (El).—Lat. 19° 42', long. 100° 55', elev. 2300 m. A ranch 5 kilometers by road east of El Temazcal; pine-oak forest.
Angahuan.—Lat. 19° 33', long. 102° 14', elev. 2440 m. A Tarascan village about 27 kilometers northwest of Uruapan; pine forest. Much of the land is still covered by a deep layer of ashes from the nearby Volcán Parícutin.
Apatzingán.—Lat. 19° 06', long. 102° 22', elev. 335 m. The largest town in the Tepalcatepec Valley; arid tropical scrub forest.