248 



REPORT OF NATIONAL MUSEUM, 1898. 



luterorbitiil scales iu three or four rows (rarely in two rows). Other scales on 

 head above small. Infraorbital chain composed of a single large plate, with one or 

 two small ones at each end. Ifnder surface of feet with small and generally almost 

 smooth scales. 



Scales ougular fold as large as those between the fore legs. General color brownish 

 yellow, with large, dark, rounded spots, the intervals usually sprinkled or dotted 

 with red (whitish in spirits) ; the tail and generally the back with a succession 

 of transverse light bands. The chain broadly streaked longtudiually with 

 bluish, without any trace of reticulation. The light dots sometimes wanting, 

 and, to a greater or less extent, the dark spots; the ground color then being 

 dark , (^- wislizenii. 



Fij;. 19. 



CUOTAPHYTUS OOLLARIS SAY. 



X 3. 



Lake Valley, Now Mexico. 



Collection of E. U. Cnp,'. 



CROTAPHYTUS COLLARIS Say. 



OrotaphytHS collaris Holbrook, N. Amcr. Herpt., II, 1842, p. 79, pi. x.— Baird 

 and GiRARD in Marcy's Red Eiver, 1813, p. 235.— Hallowell, Proc. Acad, 

 Nat. So. Phila., VIII, October, 1856, p. 238; December, 1856, p. 309.— Wied, 

 Nov. Act. Ac. Leop.-Car., XXXII, 1865, p. 58.— Baird, Rep. U. S. Expl. Surv., 

 XIII, Pt. 3, 1857, p. 17, pi. XXIV, fig. 1; U. S. and Mex. Bound. Surv., 1859, 

 p. 6.— Cope, Proc. Acad. Nat. Sci. Phila., 1866, p. 302.— Bocourt, Miss. So. 

 Mex., Rept., 1874, p. 154, pi. xvii bis, ligs. 5, 6.— Boulenger, Cat. Liz. 

 Brit. Mus., 2<1 ed., II, 1885, p. 203. 



Agama collaris Say, Long's Expd. Rocky Mts., II, 1823, p. 252.— Harlan, Med. 

 Phys. Res., 1835, p. 142, pi., fig. 4. 



HosauruH collaris A. DUiMKKiL, Arch. Mus., YIII, 1856, p. 533, note 1. 



Head very broad, its widtli fully equal to the distance from snout to 

 ear. Supraorbital plates abruptly smaller than those on the middle 

 and front of head. Of these there are two rows (sometimes one row) 



