12. SCELOPORUS 361 



tail are more definitely marked with dark brown. Both 

 sexes, at all ages, show a dark brown or black patch or collar 

 in front of the shoulder, and this sometimes is continued less 

 definitely across the back and may be edged with pale blue. 

 The lower surfaces are yellowish white' more or less clouded 

 with dark brown or slate or suffused with blue. The gular 

 region usually shows a large central blue area surrounded 

 by dark brown or black, often with light longitudinal or 

 oblique lines of white, gray or blue. The chest may be 

 yellowish white, brown or black. The belly is blue later- 

 ally while the central strip may be yellowish white, gray, 

 brown or black. 



Ruthven describes the coloration as follows: "There are 

 no light dorsal lines, and the collar, is not, as a rule, well 

 defined. The limbs are definitely cross-banded above even 

 to the ends of the digits. The tail is only indistinctly cross- 

 barred. The head is uniformly light brown, very minutely 

 speckled with black. In females the color of the dorsal 

 surface is light brown relieved by spots of yellow and blue, 

 and a fairly distinct row of black cross bars on either side. 

 In males the color is more uniform as the dark bands are 

 wanting} the general color is dark brown with so many spots 

 of bright blue that the entire dorsal surface has a bluish 

 green cast. 



"The ventral surface of the females is light yellow 

 often tinged with bluish on the throat, sides of belly, and 

 tail. In the males the inferior surface of the limbs and 

 breast, and a narrow band along the middle of the belly, are 

 yellow; the sides of the belly are bright blue, and there is 

 on the throat a spot of very intense blue that fades out to 

 a white or gray anteriorly." 



