ecimens from central Veracruz, 8 have twelve rows and one has
fourteen; of six specimens from Hidalgo, 5 have twelve rows and one has
sixteen; of two specimens from Guanajuata, one has fourteen and the
other has sixteen rows. All of the 35 specimens from the Sierra de
Coalcoman have sixteen rows. Furthermore, these specimens have the
superciliary row extended anteriorly, so that the anterior superciliary
is in broad contact with the loreal. Specimens from Cerro Tancitaro have
a shorter superciliary row, so that the anterior superciliary is not in
broad contact with the loreal. These characters were used by Tihen
(1949:220) to distinguish _Gerrhonotus imbricatus ciliaris_ from _G.
imbricatus imbricatus_. According to Tihen, the subspecies _G.
imbricatus ciliaris_ ranges from Guanajuato and Hidalgo northward to
Chihuahua and Coahuila, whereas the nominal subspecies occurs from
Michoacan and Hidalgo southward to Oaxaca. Specimens from the Sierra de
Autlan in Jalisco are like those from Cerro Tancitaro; consequently,
there seems to be no connection between the populations of _G.
imbricatus ciliaris_ in the mountains of the northern part of the
Mexican Plateau with the _ciliaris_-like individuals found in the Sierra
de Coalcoman. The acquisition and study of additional material from
throughout the range of the species is necessary to clarify the picture
of geographic variation. Until then, I prefer to consider all of the
specimens from Michoacan as _Gerrhonotus imbricatus imbricatus_.

The largest specimen is a male having a snout-vent length of 136 mm. Two
juveniles collected in July 24, 1960, have snout-vent lengths of 36 and
42 mm. A specimen having a snout-vent length of 127 mm. and a tail
length of 145 mm. was regurgitated by a _Crotalus pusillus_, which had a
body length of 550 mm.

_Gerrhonotus imbricatus imbricatus_ is an inhabitant of coniferous
forests. In the Cordillera Volcanica it occurs from 1500 to 3500 meters
at the top of Cerro Tancitaro. In the Sierra de Coalcoman it occurs from
2100 to 2700 meters. On July 4, 1955, a pair was found in copulation
beneath a pine log at 2700 meters on Cerro Barolosa. The male was lying
on top of the female and was holding her head firmly in his jaws; the
male's tail was curled under the female's tail, so that the cloacae were
in contact.

Serpentes

~Typhlops braminus~ (Daudin)

_Eryx braminus_ Daudin, Hist.... des reptiles, 7:279,
1803.--Vazagapatam, India.