60 CALIFORNIA ACADEMY OF SCIENCES rP*oc. 4th Ser. 



34. Sceloporus rufidorsum Yarrow 



Twenty specimens (Nos. 8533-8537, 8539-8540, 8561, 8594- 

 8600, 8622, 8627-8631) from Ensenada agree perfectly in 

 coloration with others from Cerros Island. When this large 

 series is compared with a large series of 5. zosteromus from the 

 Cape Region it is found that they represent different species. 

 No difference in squamation appears, but the femoral pores 

 average fewer (16.56) than in 5\ zosteromus (18.46) and 

 more than in S. magister (12.61). In 5. rufidorsum mid- 

 dorsal and dorsolateral longitudinal light stripes are present, 

 and the parallel dark lines which mark the lateral scales in 

 adult males of 5. zosteromus are lacking. The coloration of 

 5". magister is quite different and much less ornate. 



35. Sceloporus zosteromus Cope 



This was a fairly common lizard throughout the lower levels 

 in the Cape Region, where it was collected at the following- 

 localities : Todos Santos, Cabo San Lucas, San Jose del Cabo, 

 Miraflores, Agua Caliente, Buena Vista, San Antonio, San 

 Pedro, and La Paz. It inhabited the brush fences around the 

 settlements and the heavy patches of brush in the cactus belts, 

 and was found to be extremely shy. The natives claim that 

 this lizard is dangerous, and say that its bite is fatal to dogs. 

 This seems to be a wide spread belief as all who saw it in the 

 collection made the same remark. Their name for it is Bejore. 

 None captured was as large as its near relatives, 5. magister 

 and 5. rufidorsum. From the specimens taken in the Cape 

 Region it appears that 5. zosteromus is a much smaller species. 



The males at this season (June to July) were brilliantly 

 colored. A specimen in life showed the following coloring: 

 Throat patch metallic blue ; white stripe two or three scales wide 

 down center of belly bordered by one of indigo blue, the blue 

 one bordered by one of light green about two scales wide ; 

 sides grayish, turning to brown on the back; top of thighs and 

 base of tail straw-colored. 



The dorsal scales between the interparietal and back of 

 thighs in forty-three specimens examined vary from twenty- 

 six to thirty-two ; being 26 once, 27 eight times, 28 five times, 

 29 fourteen times, 30 eight times, 31 six times, and 32 once. 



