28. COLUBER 687 



young forms a distinct line along the third and fourth 

 rows of scales. All of these lines fade out on the tail. The 

 head is spotted with yellow. The lower surfaces are yellow 

 or yellowish white, marked with slate or black anteriorly 

 and along the tips of the gastrosteges, and often more or 

 less tinted, especially posteriorly, with delicate rose pink. 



Length to anus 772 803 859 910 940 971 



Length of tail 339 350 358 366+ 418 362 



Distribution. This species ranges from Texas, New 

 Mexico and Colorado west to California, and north to 

 Idaho. 



In Arizona, it has been secured at Fort Whipple and 

 Prescott, Yavapai County; Oak Creek, Coconino County ; 

 and at Carres Ranch, Sierra Ancha, Gila County. 



In Utah, specimens have been collected at Ogden, 

 Weber County; Fort Douglas, Salt Lake County; Provo, 

 Utah County; Kanosh and Cove Fort Millard County, 

 Bakers Canyon, Beaver County; near Rush Lake, Iron 

 County; and Bluff City, San Juan County. 



In Idaho, it has been taken between Bliss and the Snake 

 River, Gooding County, and at Boise, Ada County. 



In Nevada, this species has been taken in White Pine 

 (Antelope Springs), Ormsby (Carson), Washoe (Pyramid 

 Lake, Little High Rock Creek), Elko (Carlin), 

 Humboldt (Quinn River Crossing at 4100 feet; Big 

 Creek at 5000 feet, and Leonard Creek at 4700 feet, in the 

 Pine Forest Mountains), and Nye (Pablo Creek at 6,200 

 feet in the Toiyabe Mountains), counties. 



In Oregon, it has been found on the Snake River. 



In California, it seems to be fairly common in Inyo 

 County (Maturango Spring, Argus Range, Coso Valley, 

 Coso Mountains, Panamint Mountains), and has been se- 



