CKOCODTLIANS, TJZARDS, AND SNAKKS 



1159 



rower posteriorly than in GJuci/er^und the nose is ninch more depressed, 

 the rostral being trianguhir and as wide as high, wliile in ('. Inci/cr it is 

 a tliird higher than wide. There are two small snhtriangular or sub- 

 circnlar internasals in {*ontact, and behind th(^se is a row of four scales, 

 the outer and largest one lying directly over the nostril; posterior to 

 these is a third row of five or six scales connecting the anterior extremi- 

 ties of the snperciliaries, the external scale of which row is a little in 

 advance of the rest; behind this row two very large scales connecit the 

 snperciliaries, behind which the crown is covered with plates muck 

 larger than in G. Incifer. The space between the superciiiaries is nar- 

 rower than in C. Incifer, and is occupied in front by bnt two longitudinal 

 rows of scales, while tliere are six to eight in the former species. The 

 rattle is more slender than in any other species excepting C. cerastes. 

 The markings on the body of this species are much as in C.atrox and 



Fig. 332. 



CUOTALUS ADAMANTEUS SCUTULATrS IvENNirOTT. 

 = 1. 



Fort BHclianau, (Tucson) Arizona. 



Cat. No. 5021, U.S.N. M. 



quite uidike those of G. Incifer. The ground color is light yellowish or 

 brownish ash; on the middle third of the body there is a dorsal series 

 of rhomboidal blotches more or less truncated before and behind; ante- 

 riorly they become elongated longitudinally, and not only truncated, 

 but sometimes emarginateon the longitudinal angles, while the lateral 

 angles are rounded, leaving the blotches subcircular. Posteriorly the 

 dorsal blotches continue to have the lateral angles acute and perfect 

 till they become confluent with a lateral series, and form nineteen half 

 rings, six of wiiich are on the tail. In the middle third of the body the 

 dorsal blotches are inclnded in eleven or twelve dorsal rows and are 

 four to four and a half scales in longitudinal extent; anteriorly they 

 become longer longitudinally, and only nine to ten scales in transverse 

 diameter. The dorsal blotches are light brown, bordered for the width 

 of one scale with darker. They are separated along the backs by a 

 line of the ground color one and a half to two scales in width, and imnie- 



