CROCODILIANS, LIZARDS, AND SNAKEH^. 403 



the tbird from that travcised by the first mentioned yellow line. There 

 are even obscure indications of a third lateral series of dark blotches 

 below this last line. On the back, where most distinct, the U-m;irks 

 (the convexity behind) have their outline black, bordered l)eliind l)y 

 whitish (ou the tips of scales), the interior lilled up first by olive brown 

 and then by tirayer. The lateral series are somewhat similar, the 

 lower light Tine being formed by light borders to adjacent U-shaped 

 blotches of the second and third series. There is a V-shaped mark on 

 the occipital region, the angle anterior, and another behind the nos- 

 trils, with an intervening blotch and a transverse bar on the supercili- 

 ary region. There is a short line above the insertion of the arm and 

 another on the shoulder below it, but no trace of a short perpendicular 

 line. The under parts are uniform whitish. The specimen is a female 

 and laclvs the blue of the chin and sides. 



This species has the general appearance of S. graciosus, but has the 

 scales above much larger and more elongated. The upper light yellow 

 lines are narrower and more sliarply defined, being on one row of scales, 

 separated by six or seven scales, instead of on one and two halves, sep- 

 arated by inne or ten. The U-iuarks are better defined. There is uo 

 trace of the short perpendicular black bar in front of the shoulder and 

 little of the two on the posterior face of the thigh. The U-marks on 

 the head are peculiar. The head is narrower; the plates anteriorly 

 more symmetrical, and decidedly wrinkled instead of small. The feet 

 are much shorter. 



From ^'. consohrinus it differs in the U-shai)ed marks on the back, the 

 very narrow light lines on the middle of one row instead of on the adja- 

 cent edges of two, the rugose plates of the head, the weak feet, the 

 elongated thin scales. 



Sceloporus scalaris Wiej/mann. 



PHRYNOSOMA Wiegmann. 



ritrynosoma Wiegmann, Isis, 1828, p. 367; Herpet. ]\[ex., 1834, p. 52.— Wagler, 

 Syst. Aiuph. 1830, p. 145.— Dumkkil and Bibuon, Erp., G^n. IV, 1837, p. 

 311.— FiTZiNGEK, Syst. Eept.., 1843, p. 78.— Gray, Cat. Liz., 1845, p. 227.— 

 GntARD, U. S. Expl. Exp. (Cb. Wilkes) ; Herpet., 1858, p. 388.— Hocourt, 

 Miss. Sc. Mex., Kept., 1874, p. 231. — Boulenger, Cat. Liz. Brit. Mus., II, 

 1885, p. 239. 



Balrachosoma Fit/inger, Syst. Rapt., 1843, p. 79. — Girard, U. S. Expl. K\p. 

 (Ch. Wilkes), p. 400.— Bocourt, Mis. Sc. Mex., p. 259. 



Tropidogasfer Fitzinger, Syst. Rcpt., 1843. (Not of Dnru^ril and Bibron.) 



Anota Halloweix, Proc. Acad. Nat. Sci. I'hila., 1852, p. 182.— BocorRT, Miss. 

 Sc. Mex., Kept., 1874, p. 230. 



Tapaija Girarh, IT. S. Expl. Exp. (Cli. Wilkes), \,. 394 (not of Fitzinger). — 

 Bocourt, Misti. Sc. Mex., Kept., 1874, p. 220. 



