siniferus siniferus~ Cope

_Sceloporus siniferus_ Cope, Proc. Amer. Philos. Soc.,
11:159, 1869.--Pacific side of the Isthmus of Tehuantepec.
Type locality restricted to Tehuantepec, Oaxaca, Mexico, by
Smith and Taylor (1950b:134).

_Sceloporus siniferus siniferus_, Smith and Taylor, Bull. U.
S. Natl. Mus., 199:134, October 26, 1950.

Twenty-six km. S of Arteaga; Barranca de Bejuco (2);
Coahuayana; El Ticuiz (2); La Mira; La Orilla (2); La
Placita (9); Maruata; Ojos de Agua de San Telmo; Ostula (4);
Playa Azul (6); Pomaro (2); Puerto de las Higuerita; Santa
Ana (3).

This small terrestrial species inhabits the dense arid tropical scrub
forest on the coast and lower foothills of the Sierra de Coalcoman to
elevations of about 150 meters. It also occurs in the lower Balsas
Valley, but it has not been found in the scrub forest of the broad
Tepalcatepec Valley. Perhaps the large number of _Sceloporus siniferus_
on the coastal lowlands is responsible for the small number there of _S.
pyrocephalus_, another terrestrial species of about the same size. The
latter is abundant in the Tepalcatepec Valley, where _S. siniferus
siniferus_ has not been found. _Sceloporus siniferus siniferus_ is a
fast runner and difficult to collect; consequently, the small number of
specimens available is not indicative of its abundance.

~Sceloporus spinosus spinosus~ Wiegmann

_Sceloporus spinosus_ Wiegmann, Isis von Oken, 21:370,
1828.--Mexico. Type locality restricted to Puebla, Puebla,
Mexico, by Smith and Taylor (1950b:116).

_Sceloporus spinosus spinosus_, Martin del Campo, Anal.
Inst. Biol. Mexico, 8:262, 1937.

Cojumatlan (2); Huetamo Road; Lago de Cuitzeo (4); Maravatio
(8); Tupataro (2).

Although this species is widespread on the southern part of the Mexican
Plateau, it is uncommon in Michoacan. It has been collected only in
rather open situations in the mesquite-grassland on the plateau between
1500 and 2300 meters, where it has been found in association with
_Sceloporus dugesi intermedius_ and _S. scalaris scalaris_. Most
specimens of _Sceloporus spinosus spinosus_ have been observed on rock
fences. In this habitat the species is the larger member of a pair of
species, the smaller of which is _Sceloporus dugesi intermedius_.

~Sceloporus torquatus torquatus~ Wiegmann

_Sceloporus torquatus_ Wiegmann, Isis von Oken, 21:369,