CROCODILIANS, LIZARDS, AND SNAKES. 



1157 



yellowisli line from the small eye to the rictus. No lines on the neck. 

 Tail (lark gray, with five obscure rings. 



This is the largest specie^: of the Tierra Tenij)lada of Mexico, and it 

 ranges over the whole of it. Dr. Dugcs has found it near (Tuanajuato, 

 and it occurs in the Valley of Mexico. I described it from a specimen 

 from ('olima, niid the Geograi)hical Commission of Mexico found it after- 

 wards in the State of Puebla. It has not yet beeu found within the 

 limits of the United States. Boulenger does not distinguish it fi-om 

 the G. durissus of South America, which occurs in the Tierra Caliente of 

 Mexico. 



Fig. 331. 



Crotai.i's basiliscus Cope. 



^= 1. 



(^oliniii, 5Iexic(). 



CROTALUS ADAMANTEUS Beauvois. 



Crotalns ndamanlcus Ukauvois, Traiia. Anier. Phil. Soc, IV, 1799, p. 368. — Cope, 

 Check-list N. Amer, Batr. Rcpt., 1875, p. 33.— Stejneger. Kept. U. S. Nat. 



Mus. for 1893, 189r>, p. 433. 



Muzzle with small scales between those of the canthus rostralis; ros- 

 tral plate in contact with the nasals; one or two loreals. Scales in from 

 twenty-flve ti) twenty-nine rows. Color brown or gray, with large rhom- 

 bic spots on the back, which extend to the head without being re[)laced 

 by longitudinal stripes anteriorly. Tail light colored, with black cross- 

 bands, (lastrosteges, from one hundred and sixty-eight to one hundred 

 and eighty-six. Size large. A broad dark-yellow bordered postocular 



