Distribution. — This beautiful snake has been taken in 

 Texas, Oklahoma, New Mexico, Arizona, California, and 

 Lower California. 



In Mexico, it ranges south to the city of Chihuahua. 

 It occurs in both Upper and Lower Sonoran zones. 



In Arizona, it has been taken near Tucson, Pima County; 

 at Camp Grant, Graham County; on the mesa south of 

 Fort Mohave, Mohave County; near Phoenix, Maricopa 

 County; and at Yuma, Yuma County. 



In Lower California, it probably is confined to the 

 northern end of the peninsula, where it has been secured at 

 Ensenada, San Tomas, and San Quintin. 



In California, the most northern localities are Fresno, 

 Fresno County, and McKittrick, Kern County. Farther 

 south, it has been found in Los Angeles (Alhambra), San 

 Bernardino (near Ontario), Riverside (Riverside, San Jacin- 

 to), and San Diego (between Carlsbad and Oceanside, War- 

 ner's Ranch, Pacific Beach, west slope of coast range on San 

 Diego wagon road, Campo, and Valleclto), counties, and 

 on the Mohave Desert. 



Habits. — A captive individual ate a Brown-shouldered 

 Lizard (Uta s tans bur iana). A fine male dug out of a hole 

 in a sand hill east of Yuma, Arizona, contained a Dipso- 

 saurus dorsalis which it had eaten. 



Genus 33. Pituophis 



Pitnofhis HoLBRooK, N. Amcr. Herpet., Ed. 2, Vol. IV, 1842, p. 7 



(type, melanoleucus). 

 ChuTchillia Baird & Girard, Stansbury's, Exped. Gt. Salt Lake, 1852, 



p. 350 (type, bellona). 



The body is long but rather stout, with tail of moderate 

 length. The neck usually is slightly constricted, so that the 



