continuous. It has been
found between 1050 and 1550 meters on the slopes of the Cordillera
Volcanica, and on the coast and seaward slopes of the Sierra de
Coalcoman up to an elevation of 900 meters. It is absent from the
Tepalcatepec Valley. At Uruapan and at Cascada Tzararacua this lizard
was found on the ground in oak forest or in open pine-oak forest; on the
coast and foothills of the Sierra de Coalcoman it was found on the
ground in the gallery forests along streams, and not in the scrub
forest.

~Urosaurus bicarinatus tuberculatus~ (Schmidt)

_Uta tuberculata_ Schmidt, Amer. Mus. Novitates, 22:4,
December 1, 1921.--Colima, Colima, Mexico.

_Urosaurus bicarinatus tuberculatus_, Mittleman, Bull. Mus.
Comp. Zool., 91:169, September, 1942.

Twenty-six km. S of Arteaga; Cascada Tzararacua (2); Chupio;
Coahuayana; Coalcoman (8); El Sabino (2); Jungapeo; La
Orilla (2); La Placita (4); Playa Azul (4); Pomaro (2); San
Salvador (16);? Tupataro; Uruapan (12); Tzitzio; Zamora.

The known distribution and geographic variation of _Urosaurus
bicarinatus_ in southwestern Mexico presents a confused picture. In
general rugosity, specimens from the coastal region of Michoacan
(Coahuayana, La Orilla, La Placita, Playa Azul, and Pomaro) resemble _U.
bicarinatus tuberculatus_ to the north along the Pacific coast.
Furthermore, specimens from the coast have less stippling in the gular
region than do those from the Sierra de Coalcoman and the slopes of the
Cordillera Volcanica. Specimens from the mountains have greatly carinate
enlarged dorsals, large lateral tubercles, and heavily stippled throats;
in these characters they resemble specimens from Morelos, Guerrero, and
Oaxaca. As mentioned by Peters (1954:14), some specimens from La Orilla
and San Salvador are like _U. bicarinatus bicarinatus_ in certain
characters, and one specimen has the blue ventral patches restricted to
the sternal area, a characteristic of _U. bicarinatus anonymorphus_ of
Oaxaca and eastern Guerrero. Examination of all available specimens from
Michoacan indicates that the nature of the dorsal scales is of little
value in separating the subspecies. The specimens from Michoacan are
here provisionally referred to _U. bicarinatus tuberculatus_, because
cursory examination of specimens from several localities between Nayarit
and Oaxaca shows that there are only minor differences between the named
populations. Individuals fr