32 A SYNOPSIS OF THE SPECIES OP 



die of the edge of the collar, and there are a few smaller scales between the large 

 brachial and postbrachial scales. 



Two specimens from Tehuantepec, Sumichrast, the larger equal in size to the 

 Amiva surinamensis. 



Cnemidophorus guttatus microlepidopus Cope. 



Gnemidophorus microlepidopus Cope, Proceeds. Amer. Philos. Soc., 1877, p. 370. 



This form differs from the typical guttatus in color only, and m^y be the young. 

 The median dorsal region is, however, unspotted. 

 One specimen, Tehuantepec, Sumichrast. 



Cnemicbpliorus guttatus unicolor Cope. 



Cnemidophorus unicolor Cope, Proceeds. Amer. Philos. Soc, 1877, p. 93. 



The form is represented by one of the smallest spscimcns. According to the 

 rule which prevails in this genus, it should be striped if merely the young of the C. 

 g. guttatus. The absence of stripes then indicates probably a race different from the 

 typical form of the species. 



One specimen from Tehuantepec, SuinicJirast. 



Cnemidopliorus guttatus guttatus Wicgm. 



Cnemidophorui guttatus Wiegm., I. c; Bocaurt, I. c; Boulenger, I. c. 

 Amiva guttata Cope, Proceeds. Acad. Phila., 18G3, p. 63. 



Three specimens from Jalapa, Pease, in the Museum of the Philadelphia 

 Academy. 



The above specimens are of relatively large size, equaling the C. g. immutahilis. 



Cnemidophorus maximus Cope. 



Proceeds. Academy Phila., 1863, p. 104. 



The largest species of the genus, equaling many of the Amivas in dimensions. 

 It inhabits the peninsula of Lower California. 



This species varies in the number of its anal plates, some specimens having 

 fewer than others. The brachial plates also var}' in number from six to eight rows. 

 Two young specimens (No. 12,658) in which the umbilical fissure is still open, are 

 about as large as the adult C. sexlineatus. They have a median dorsal light stripe, 

 and two on each side on a blackish ground. Each of the two dark bands thus pro- 

 duced is marked by two rows of pale spots. In this they differ from the spotted 



