12. SCELOPORUS 351 



Remarks. S. zosteromus, S. rufidorsum, and S. magister 

 are very closely related. They all have the elongate ear 

 scales which distinguish them from S. clarkii y and seem not 

 to differ from each other in squamation. When good series 

 of well preserved specimens are examined certain differ- 

 ences in coloration are evident. S. zosteromus has no mid- 

 dorsal longitudinal streak or band, either dark or light, 

 while S. rufidorsum has a narrow, light streak, and S. magis- 

 ter usually has a dark band. S. zosteromus has no dorso- 

 lateral light stripe (except sometimes on the neck) while 

 5. rufidorsum and S. magister usually have such a light 

 stripe. S. zosteromus almost always has distinct, narrow, 

 parallel, dark lines on the sides which are not developed in 

 5. rufidorsum and S. magister. S. zosteromus seems not to 

 grow to such a size as is attained by some specimens of the 

 other two species. These remarks all refer to adult males. 

 Females are less characteristic. 



Distribution. The San Lucan Scaly Lizard was origi- 

 nally described from specimens collected at the cape of this 

 name. It has since been found at La Paz, San Jose del Cabo, 

 San Pablo, Miraf lores, Todos Santos, Agua Caliente, Bue- 

 na Vista, San Antonio, and San Pedro, all in the Cape Region 

 of Lower California, and on San Jose Island. Specimens 



