348 CALIFORNIA ACADEMY OF SCIENCES. 



Pituophis sayi(SchL). 



Gopher Snakes were found only at Fort Lowell. They 

 were evidently quite common, for Mr. Price preserved 

 more specimens of this than of any other snake. All 

 were secured in May and June, 1893. 



Crotalus molossus Baird & Girard. 



A single typical specimen is represented in the collec- 

 tion by a head, neck and tail. It was taken at Fort 

 Lowell in June, 1893. 



Crotalus atrox Baird & Girard. 



The head and posterior portion of an adult C. atrox 

 (1712), collected at Fort Lowell, May 25, 1893, are 

 pinkish buff. Number 1708 is a young specimen, also 

 from Fort Lowell, and, like most Arizonan examples of 

 this rattlesnake, is much paler than those from the San 

 Lucas Fauna of Lower California. 



Crotalus lepidus Kenn. 



There seems to be a general clearing of the ground- 

 color with age in this species. Two adult specimens (No. 

 3139 and Cal. Acad. Sci. No. 179) have very few scales 

 between the large dorsal blotches tipped with dark brown. 

 A younger individual (No. 1814) shows a greater number 

 of these dark -tipped scales. The smallest of the four 

 (No. 4099) is well supplied with small blackish blotches, 

 which sometimes form cross -bands between those which 

 persist in the adult. 



One of the most noticeable features of this rattlesnake 

 is the bright tawny coloration of the tail. The belly of 

 the smallest specimen (320 mm.) is mottled with dark 

 seal brown. The sides are tinted with salmon buff. 



In two specimens the nasal plates are distinct both above 

 and below the nostrils. In a third thev are distinct below 



