HOLBROOKIA.—UTA. 61 
middle of the length of the trunk. Tail depressed, but less so than in JH. texana, 
uniform white underneath. . 
In the adult female the black lateral bands are shorter, less distinct, and may 
disappear altogether. It seems to me very probable that Holbrookia elegans, from 
Mazatlan, is founded on such a specimen without spots. 
Extralimital: Holbrookia lacerata, Cope, Bull. U.S. Nat. Mus. 1880, no. 17, p. 15, 
from Texas. 
UTA. 
Uta, Baird & Girard, in Stansbury’s Exped. Gr. Salt Lake, p. 344 (1852). 
1. Uta lateralis, (Tab. XXXI. fig. D.) 
Uta (Phymatolepis) lateralis, Boul. Ann. & Mag. N. H. 5th ser. xi. p. 342. 
? Uta gularis, Cragin, Bull. Washburn Labor. 1884, p. 7. 
Hab. Mexico, Presidio and Tres Marias Islands (Forrer). 
Hind leg, if laid forwards, extending to the tympanum. The nasals are in 
immediate contact with the internasals, On each side of the median line, which 
is formed by a series of very small keeled scales, there are two rows of large scales, 
the scales of the inner row being twice or thrice as large as those of the outer. 
The remainder of the back and sides is covered with minute tubercular scales, but on 
either side of the back a row of larger keeled scales runs nearly along the entire length 
of the back. The scales of this row are not by any means regular in size and arrange- 
ment; no other row of larger scales on the sides ; three or four pointed scales in front 
of the tympanum, but none along its upper circumference. Upper parts brownish-grey, 
with a double row of small indistinct black spots along the middle of the back ; 
another row of larger subrhombic black spots along each side of the back. A whitish 
band runs from the end of the snout along the upper lip, and passes through the 
tympanum to the shoulder-joint ; a black vertical bar in front of the shoulder, with a 
horizontal extension above and below forming a figure like the letter Z. Male with 
the throat blue and without blackish cross-bands. Abdomen blue with a whitish 
median band. 
Of the six specimens I have examined, one of the largest and most adult is 134 millim. 
long, the tail measuring 80 millim. 
It is probable that Uta gularis, Cragin, from Guaymas, Mexico, is identical with 
this species; but it would seem to differ by a slightly shorter hind leg, which extends 
forward only to the front of the shoulder-joint, and by possessing a short additional 
row of larger scales on each side of the abdomen. 
Uta auriculata, Cope, Proc. Bost. Soc. N. H. xiv. p. 303, from Socorro, one of the 
Revillagigedo Islands, is also closely allied to this species, but distinguished by a crest 
of scales above the tympanum, and blackish cross-bands in the gular region. 
