210 IGTJAl^ID^. 



body. Hind foot short, less than one third of head and body. Six 

 or eight supraocular scales surrounded by granules ; scales of snout 

 tubercular ; labials less elongate, five oblique, one flat. Femoral 

 pores twelve or thirteen. Colour light brown, with six pairs of 

 transverse dark brown bars between the scapular region and groin, 

 which extend downwards and backwards on the abdomen : their 

 posterior border is serrate or digitate, and edged with yellowish, 

 producing a variegated pattern ; a pale band on inferior part of 

 side, which is crossed by the ends of the lateral spots ; no bluish- 

 black spots on the sides of the belly ; traiisverse blaish-black spots 

 on the inferior side of the tail. 

 Texas. 



48. UTA. 



Uta, Baird 8f Gir. in Stansh. Exped. Gr. Salt Lake, p. 344. 

 Urosaurus, HaUuiv. Proc. Ac. Philad. 1854, p. 92. 

 Phvmatolepis, A. Dum. Arch. Mus. viii. p. 548 ; Bocourt, Miss. So, 

 Mex., Rept. p. 165. 



Tympanum distiuct. Body depressed ; no dorsal crest ; dorsal 

 scales small, keeled, uniform or heterogeneous. Upper head-scales 

 enlarged, occipital very large. A strong transverse gular fold, with 

 denticulated edge ; a second anterior fold sometimes present. Digits 

 with keeled lamellae inferiorlj. Femoral pores. Tail moderate, 

 subcylindrieal, covered with large keeled scales. Lateral teeth tri- 

 cuspid ; no pterygoid teeth. A large sternal fontanelle. No ab- 

 dominal ribs. 



North America and Mexico. 



In all the species the head is relatively small, the snout short, 

 with angular canthus ; nostril superior, near the end of the snout ; 

 upper head-scales smooth. The digits are slender and pectinate 

 inferiorly. Males possess enlarged postanal scales. 



Synopsis of the Species. 



I. Dorsal scales uniform, larger than those on the flanks. 



Dorsal scales minute, a little larger than 



those on the sides 1, stansburiana, p, 211. 



Dorsal scales much larger than those on 



the sides 2, elegans, p, 211, 



II. A band of six to eight longitudinal series of equal-sized 

 enlarged scales along the middle of the back, 



No lateral series of enlarged scales .... 3. nigricauda, p. 212. 

 A lateral series of scales imitating the 



lateral line of fishes 4, ornata, p, 213' 



III. Dorsal lepidosis heterogeneous. 



A band of six or eight longitudinal series 

 of enlarged dorsal scales, the two 



