_Sceloporus intermedius_ Dugès, La Naturaleza, 4:29, 1877.--La Noria, near Zamora, Michoacán, México. _Sceloporus dugesii intermedius_, Smith, Univ. Kansas Sci. Bull., 24:663, February 16, 1938. Cojumatlán (6); Jiquilpan (11); Lago de Camécuaro; Lago de Chapala; Morelia (23); Pátzcuaro (84); Quiroga (35); Sahuayo (4); Tacícuaro (2); Tangamandapio (17); Tangancícuaro (9); Zacapu (4); Zamora (11); Zinapécuaro (9). This lizard is strictly an inhabitant of the Mexican Plateau, where it is found in rocky places, sometimes in pine-oak forest, but more frequently in mesquite-grassland. It is a terrestrial species, and is most often seen on rock fences at elevations of 1500 to 2200 meters. This species differs from _S. bulleri_ and _S. torquatus_ in having two rows of supraoculars, instead of one; also it has more dorsal scales. Twenty-six specimens of _Sceloporus dugesi intermedius_ from Tangamandapio and Tangancícuaro have 44-48 (45.7) dorsal scales, as compared with an average of 38.7 in _S. bulleri_ and 29.3 in _S. torquatus_. In life _Sceloporus dugesi intermedius_ has a dull greenish gray dorsum; in males the belly patches are bright blue bordered medially by black, and the throat is bluish gray. The largest specimen examined is a male having a snout-vent length of 80 mm. ~Sceloporus gadowae~ Boulenger _Sceloporus gadoviae_ Boulenger, Proc. Zool. Soc. London, 1905, 2:246, October 7, 1905.--Mezquititlán, Guerrero, México. Chupio; El Sabino (77); La Playa (6); Río Marquez, 10 km. S of Lombardia (11). Although this species has a rather extensive range in the Balsas-Tepalcatepec Basin in the state of Michoacán, Guerrero, Morelos, and Puebla, it is only locally abundant in that area. Usually these lizards are found on rocky cliffs in which there are many crevices for cover. _Sceloporus gadowae_ is abundant on a conglomerate cliff along the Río Marquez south of Lombardia. Although the closely related _S. pyrocephalus_ is abundant in the stream valley and in the hills above the cliff, _S. gadowae_ has been found only on the cliff; few individuals of _S. pyrocephalus_ have been observed on the cliff. A similar situation was discovered on a much more extensive conglomerate cliff along the Río Balsas near Mexcala, Guerrero. Near Tehuitzingo, Puebla, where _S. pyrocephalus_ was not found, _S. gadowae_ was found on conglomerate cliffs. Probably there is strong competition between the two species; possibly this has resulted in the restriction of _S. gadowae_ to isolated cliff-habitats within the extensive range of the more widespread _S. pyrocephalus_. In Michoacán _Sceloporus gadowae_ has been found along the lower slopes of the Cordillera Volcánica at elevations from 250 to 1050 meters. All of the localities from which this lizard is known lie in the arid tropical scrub forest. ~Sceloporus grammicus microlepidotus~ Wiegmann