408 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. VII. 



crest, slightly larger, more faintly keeled and less convergent dorsal 

 scales, and the very large and strongly spinose scales on the tail. 

 The nostril is slightly lower and less directed upward. The bands 

 on under surface of the head are much more conspicuous than on any 

 of the specimens of A. colonorum in the collection. 



All of the specimens are males. The above measurements are 

 given in mm. 



Agama atricollis A. Smith. 



Nairobi. Body 80 mm., tail 92 mm., 9 ; body 103 mm., tail 

 1 10 mm., cJ 1 . 



Kijabe. Body 35 mm., tail broken. 



Gil Gil. Body 77 mm., 9 ; body 88 mm., tail 103 mm., cT ; body 

 113 mm., tail 118 mm., cT. 



Lake Elmenteita. Body 75 mm., tail 76 mm., 9 ; body 100 mm., 

 tail in mm., 9 ; body 87 mm., tail 101 mm., c? ; body 99 mm., tail 

 122 mm., c? ; body 115 mm., tail 147 mm., cJ 1 ; body 88 mm., tail 

 103 mm., c? ; body 113 mm., tail 118 mm., c?. 



The specimens mentioned above show some variation, the female 

 from Nairobi and a female (loomm.) and a male (87 mm.) from Elmen- 

 teita have 5 whitish blotches on dorsal surface about the size of the 

 eye, and a few narrow faint whitish lines across the back between these 

 blotches; the tail is distinctly barred with black. On the female 

 from Gilgil these spots and lines are very indistinct. The ventral 

 surface of the head is light to dark brown irregularly spotted with 

 lighter, to bluish black on the old males. The ground color of the 



*The tails of the three specimens from Gilgil are apparently incomplete, 

 the ends being quite blunt but are scaled over; the diameters of these ends 

 are 6, 3 and 5 mm. respectively. 



