| | |lateral spots | |
----------------+--------+-------+------------------+-----------+----------
_scalaris_ | 80-92 |32-41 |Six distinct cream|Orange-pink| 95 mm.
| (86) |(35) |stripes; tan spots| |
| | |in dark fields | |
----------------+--------+-------+------------------+-----------+----------

Although this is the largest species of _Cnemidophorus_ in Michoacan
(adult males attain a snout-vent length of 135 mm.), it is neither
widespread nor abundant. On the coastal lowlands it occurs primarily
with _Cnemidophorus lineatissimus lividus_. In the coastal lowlands
there is little open scrub forest, a type of habitat that seems to be
preferred by _C. communis communis_. In the Tepalcatepec Valley, _C.
communis communis_ occurs in the open scrub forest with the more
abundant large species _C. costatus_ (subspecies _zweifeli_). Only in
the scrub forest in the Coalcoman Valley, where no other species of
_Cnemidophorus_ occurs, is _C. communis communis_ abundant.

~Cnemidophorus costatus occidentalis~ Gadow

_Cnemidophorus communis occidentalis_ Gadow, Proc. Zool.
Soc. London, 1906, 1:339, August 23, 1906.--Type locality
restricted to Ixtlan, Nayarit, Mexico, by Smith and Taylor
(1950b:182).

_Cnemidophorus costatus occidentalis_, Zweifel, Copeia, No.
1:98; March 17, 1961.

Jiquilpan (4).

Only four specimens from the extreme northwestern part of the state are
referable to this subspecies. These have 97 to 102 dorsal granules at
midbody and lack the blue gular band or spot characteristic of the
subspecies in the Tepalcatepec Valley. Probably _C. costatus
occidentalis_ ranges throughout the Chapala depression, but to the east
it is replaced by _Cnemidophorus scalaris scalaris_.

~Cnemidophorus costatus zweifeli~ Duellman

_Cnemidophorus sacki zweifeli_ Duellman, Univ. Kansas Publ.
Mus. Nat. Hist., 10:589, May 2, 1960.--Capirio, Michoacan,
Mexico.

Apatzingan (107); Buenavista (3); Capirio (31); Charapendo
(12); Chinapa (2); 19 km. S of Corralito (3); Jazmin (2);
between La Playa and Volcan Jorullo (2); Limoncito (3); 14
km. S of Lombardia (11); Nueva Italia (15); Rio Marquez, 10
km. S of Lombardia (2); Rio Marquez, 13 km. SE of Nueva
Italia; Tafetan (18); 14 km. E of Tepalcatepec (2); Tzitzio
(11); 19 km. S of Tzit