354- 3. IGUANIDM 



brown bands separated by narrower ones of paler brown. 

 The narrow bands gradually become more or less greenish 

 or bluish, and some of the dorsal scales become copper-color 

 with blue centers. In adult males the cross-bands have almost 

 or entirely disappeared, and the back and sides are finely 

 mottled with brown, gray, green, blue, and copper-color. The 

 upper headplates are brown with pale centers. The tail is 

 cross-barred with dark and light brown or green. The throat 

 and belly in the young are bluish or yellowish white with 

 oblique dusky bands corresponding to those on the sides of 

 the head and body. In adult males the throat and belly are 

 nearly uniform dull purplish cyanine blue, the edges of the 

 scales often being black or reddish brown. There is a slightly 

 darker area in front of the shoulder, but no distinct blotch 

 or collar usually is present. In females the cross-bands 

 are more constantly present. 



Length to anus 39 72 86 100 106 109 



Length of tail 52 102 118 115 U9+ 122+ 



Snout to ear 10 17 17 20 20 21 



Width of head. 9 15 17 20 21 21 



Shielded part of head 10 15 16 18 19 19 



Fore limb 19 34 39 4-5 44 48 



Hind limb 28 52 56 66 64 67 



Base of fifth to end of 



fourth toe 11 20 22 24 23 25 



Distribution. The Dusky Scaly Lizard has been found 

 only in the coast ranges of San Bernardino, Riverside, and 

 San Diego counties, California, in the northern and central 

 parts of Lower California, and on certain islands in the Gulf 

 of California. It lives chiefly on boulders in the chapparal 

 belt of the Upper Sonoran Zone, but extends its range also 

 into the Lower Sonoran and Transition Zones. 



In California, it has been collected in San Bernardino 

 (Waterman Canyon in the San Bernardino Mountains), 



