600 



REPORT OF NATIONAL MUSEUM, 1898. 



Leugth, 343 mm. ; head, 26 mm. ; luiul leg, 70 min. ; fore leg, 37 mm.; tail, 252 mm. 



£ra6i<a<.— Northwestern Lower Califoruia and Sau Diego County, California. 



Twelve other specimens collected by Mr. Stowell at the type locality at San Telmo 

 and in the foothills of the San Pedro Martir Mountains, Lower California, do not 

 differ from the type in any important particular. The number of femoral pores 

 varies from nineteen to twenty-five, of brachial plates from four to five rows, and of 

 antebrachials from two to three rows. 



Forty-one specimens from San Diego County, California (collected in Santa Ysabel, 

 Clogstous, and Hemet valleys; at San Jacinto and in the Julian Mountains, by 

 Messrs. Hyatt and Stoddard), are essentially like those from Lower California but 

 average slightly paler in general coloration. 



Cnemidophori from northern Lower California and from San Diego County, Cal- 

 ifornia, iiresent much the general appearance of C. iigrls undulatus (Hallowell). 

 They difl"er from that form in having the dorsal scales smaller, the gular scales and 

 the scales on the collar larger, and in the presence of large and well-defined black 

 spots on the gular region. From C. tigris B. & G. they differ by character of the 

 scales as above indicated, by the absence of the slate-colored suffusion on the gular 

 regions, and by the well-defined black markings on the side of the head. 



The form does not appear to be very different from the C.graJiamii 

 grahamii, but the collar scales are somewhat differently arranged, and 

 the color is somewhat different. Mr. Van Denburgh has shown the 

 characters to be constant in a large number of individuals. 



Cnemidoplioru8 (/rahamii stejnegerii Van Dcnhurgli. 



CNEMIDOPHORUS GULARIS Baird and Girard. 



CnemidopJiorus gularis Baird and Girard, Proc. Acad. Nat. Sci. Phila., 1852, 

 p. 128.— Baird, U. S. Max. Bound. Surv., Reptiles, pi. xxxiv, figs. 1-6.— Cope, 

 Trans. Amer. Phil. Soc, 1892, p. 43. 



Cnemidophorus guttatus Hallowell, Proc. Acad. Nat. Sci. Phila., 1854, p. 192. 



This species is allied to the C. sexlineatus, but is distinguished by the 

 presence of post-antebrachiai plates, the more numerous femoral pores 

 and the longer muzzle. It is very variable as to size and color, but the 

 dark spaces between the light stripes are always marked, interrupted 

 or completely broken up by light spots or spaces, except in the young. 

 The color variations are similar to those already mentioned under the 

 head of the C. tessellatus, but they are more numerous. Specimens from 

 western Texas come nearest in character to the C. sexlineatus. It takes 

 the place of that species throughout Mexico, also replacing the C. 

 tesseUatus in the drier parts of that country. Besides the characters 

 already cited, this species differs from the C. tesseUatus in its liner 

 scales. These measure from .25 to .33 mm. in diameter, while those of 

 the C. tesseUatus measure .5 mm.; but this character does not always 

 hold good. 



