1877.] 95 
| Cope. 
spots on the external abdominal scuta and on the femora. <A longitudinal 
yellow line on the posterior face of the femora. 
Total length, M. 0.255 ; length to tympanic drum posteriorly, .020 ; to 
vent, .076 ; length of hind limb, .051 ; of hind foot, .026. 
Tuchitan, Tehuantepec, Sumichrast. 
This handsome species is, in the number of its longitudinal stripes, simi- 
lar to the @. octolineatus of Baird. That lizard differs in having four supra- 
orbital plates, and smaller collar scales; the stripes are also much nar- 
rower. 
CNEMIDOPHORUS COMMUNIS Cope. 
This species is near to the C. sexlineatus in its characters, but constantly 
differs in the presence of the frenodrbital plate. It is also much larger, 
the males equaling the large Amivas. 
A few rows of large scales on the collar, of which the marginal is the 
largest ; two preoculars and a frenodcular ; four supraorbitals ; large gu- 
lars extending across throat ; postbrachials and brachials large, continuous ; 
three large preanals ; femorals in 8-9 rows ; olive, with six light bands with 
light spots in the intervals, the former breaking into spots in the adult 
male. 
There are two varieties of this lizard. In the first, there are rows of 
light spots in the spaces between the stripes in the females ; while in the 
males the stripes are broken up into round spots so as to give a coloration 
like that of the C. guttatus. In the second variety there are no spots and 
the bands are unbroken. The specimens resemble the young of var. 1. 
Var. I. Colima, Xantus ; Coban, Guatemala, Hague. 
Var. II. Guadalaxara, Major; Cordova, Sumichrast; Guatemala, 
Hague ; San Antonio, Texas. 
CNEMIDOPHORUS ANGUSTICEPS Cope. 
This species is in general characters similar to the last, but it differs in 
the coloration, and in the very narrow form of the parietal and interparie- 
tal plates. 
A few rows of large scales on the collar, of which the marginal is the 
largest ; two preoculars and a frenodcular ; four supraorbitals ; similar but 
interparietal and parietal scuta half as wide ; gréund color black and bands 
much wider and not broken up in male. 
The color stripes of this species if assumed to be those of the paler color, 
are much wider than the ground, and instead of becoming broken up as in 
C. communis, send off lateral processes, which give the dark ground color 
a very broken character. The coilor of the bands is an olive green. The 
adult male is of about the size of those of C. communis and C. guttatus. 
Yucatan, Schott. 
CNEMIDOPHORUS COSTATUS Cope. 
In general characters this lizard resembles the last two, but it differs in 
the shorter head, and strikingly in the coloration. 
