194 BULLETIN 17 5, UNITED STATES NATIONAL MUSEUM 



Valley, Monument, Sweetwater Dam, Spring Valley, Helix, Jamacha, Bos- 

 tonia. Mission Gorge, Lakeview, Twin Brooks, El Monte, Foster, Shady 

 Dell, Wildwood, Bear Valley Dam, Palomar, Amago, Henshaw Dam, Mon- 

 tezuma, Sutherland, Stewart Well, San Felipe Valley, Ballena, El Capitan, 

 Hipass, Banner (all Klauber, 1928, in lilt.), San Luis Rey, Rose Canyon, 

 Alpine, Grossmont, Viejas, Guatay, Las Flores (Klauber, 1928, in litl.; 

 Klauber, 1931, pp. 74-81), ChoUas Heights, Dulzura, Descanso, Santee, 

 Rosedale (Klauber, 1924, p. 12; Klauber, 1928, in litt.; Klauber, 1931, pp. 

 74-81), Bonsall (Klauber, 1924, p. 12; Klauber, 1928, in Hit.; Klauber, 1932b, 

 p. 125), Escondido (Klauber, 1932b, p. 125), northwest of El Cajon, Wynola, 

 Riverview, Terrinitos (Klauber, 1931, pp. 74-80), Mission Valley (Klauber, 

 1924, p. 12; Klauber, 1928, in litt.; Klauber, 1931, p. 75; Klauber, 1932b, 

 p. 125); Rainbow (Klauber, 1928, in litt.; Klauber, 1931, p. 75; Klauber, 

 1932b, p. 125). 



Habits and habitat. — ^Van Denburgh (1897, p. 198) says of the 

 species, including this form: "Its food . . . consists of small mammals, 

 of which gophers are said to form a large part." 



Stephens (1921, p. 64) says, "They feed on gophers, mice, rats, and 

 squirrels." 



Klauber (1934, p. 17) calls this the most beneficial snake of the re- 

 gion, "as it lives exclusively on mice, rats, gophers, and other rodents." 



In regard to the hibernation of this form Riithling says (1915b, 

 p. 10): "Now and then a Pacific BuU Snake . . . will wander in search 

 of food and may be found abroad even in winter. Only exceptional 

 warm days will cause this, however." Of its feeding habits he says 

 (1916a, p. 91): "Its food consists chiefly of rodent pests, such as 

 gophers, mice, ground squirrels, and small rabbits. Although he pre- 

 fers these animals for food, the Pacific Bull Snake has a rather accom- 

 modating appetite, which must under the force of necessity adapt 

 itself to circumstances and include in his ophiological menu, birds, an 

 occasional rat, bats, and sometimes a lizard or two. Sometimes an 

 egg (or several) is commandeered, but I have never known of a Pacific 

 Bull Snake's having eaten any egg as large as a chicken's." One 

 64-inch snake, he reports, vomited four full-grow^n pocket gophers, and 

 another ate more than a dozen mice at one meal. The same author 

 reports (1916b, p. 6) finding a specimen among stones at the foot of a 

 group of oak trees "far out in the open grape field" at the mouth of a 

 canyon. 



Nelson (1922, p. 129) lists annedens from the Upper Sonoran Zone, 

 San Diegan district, of Lower California- 



EQauber (1931, opp. p. 8) lists annedens from the following zones of 

 San Diego County: Coast, inland vaUeys and mesas, foothills, moun- 

 tains, and desert foothills. The same author gives many interesting 

 notes on this form, some as follows (1931, p. 70): The greatest activity 

 is during the day, but one specimen "was observed coming out of a 

 gopher hole at seven P. M.," and another "was caught crossing the 

 road at 5:50 P. M." Specimens were collected "in a manzanita bush 



