212 IGUANID-aE. 



Dorsal scales equal, rhomboidal, sharply keeled, a little smaller than 

 the ventrals, but much larger thau the laterals. The adpressed hind 

 limb reaches the eye ; scales on upper surface of limbs larger than 

 dorsals. Twelve to fourteen femoral pores on each side. Tail once 

 and two thirds to once and three fourths as long as head and body. 

 Upper caudal scales much larger than dorsals ; subcaudals smooth 

 or very obtusely keeled. Bluish or broAvnish above, dotted with 

 lighter, with or without a double series of dark transverse spots along 

 the back ; female with a more or less distinct yellowish, black-edged 

 dorso-lateral band ; a large deep-blue spot on each side behind the 

 axilla ; belly whitish or bluish ; throat blue in the male, blackish- 

 blue spotted with white in the female. 



millim. millim. 



Total length 150 Fore limb 25 



Head 15 Hind limb 45 



Width of head. ... 10 Tail 95 



Body 40 



California ; New Mexico. 



a. (5. La Paz, Smithsonian Institution [P.]. 



(One of the types.) 



b. (S • -La Paz. Smithsonian Institution [P.]. 

 c-d. 2 • Demiug, N. Mexico, Mr. Ferrer [C], 



3. Uta nigricaiida, 



Uta nigricauda, Cope, Proc. Ac. PhUad. 1864, p. 176. 



A single frontal, separated from the occipital by the pair of 

 frontoparietals ; four large supraoculars ; three or four projecting 

 pointed scales on the anterior border of the ear. A strong pouch 

 on each side of the throat, not connected by a transverse fold, A 

 band of six or seven longitudinal rows of equal-sized, hexagonal, 

 strongly keeled dorsal scales, smaller than ventrals ; lateral and 

 dorso-lateral scales minute. The adpressed hind limb reaches 

 between the shoulder and the ear ; scales on upper surface of hind 

 limb larger' than dorsals. Eleven femoral pores on each side. 

 Upper caudal scales much larger than ventrals, strongly keeled, 

 mucronate; subcaudals sharply keeled. Dark grey above, with 

 transverse blackish bauds on the body, interrupted on the vertebral 

 line ; the anterior of these bands, on the scapular region, intense 

 black ; sides and limbs with whitish dots ; tail blackish ; belly blue 

 on each side (male), deepest near the narrow whitish median line. 

 [Throat in males orange,] 



millim, millim. 



Total length 95 Fore limb 19 



Head 10 Hind limb 28 



AVidth of head 8 Tail (reproduced) 50 



Body 35 



Lower California, 



a. S- La Paz, Smithsonian Institution [P.]. 



