194 University of California Publications in Zoology [Vou.17 
Type Locaurry.—Great Basin and southwestern deserts [= east 
slope of Beaverdam Mountains, southwestern Utah (U. 8. Nat. Mus., 
no. 18070) |. 
Synonyms.—Pityophis sayt bellona, part; Pityophis catenfer, 
part; Pityophis bellona, part. 
Common Names.—Western Bull Snake, part; Southern Bull 
Snake; Arizona Bull Snake; Gopher Snake, part. 
RanGe.—East of the desert and Great Basin divides, the whole 
length of the state. Oceupies the Lower and Upper Sonoran life-zones. 
Inhabits nearly all types of arid environment. 
Subfamily BorginaE 
Tantilla eiseni Stejneger 
California Tantilla 
OriGInAL DescripTION.—Tantilla eiseni Stejneger, Proe. U. 8. Nat. 
Mus., 18, April 16, 1896, pp. 117-118. 
Typr Locauiry.—F resno, California. 
Synonym.—Tantilla nigriceps. 
Common Names.—Fisen’s Black-headed Snake; Black-headed 
Tantilla. 
Rance.—The southern portion of the state. Only three record 
stations to date: Fresno, Fresno County (as above); near Mohave, 
Kern County (one specimen in Southwest Museum at Los Angeles, 
fide C. L. Camp), and near Los Angeles (Riithling, Copeia, no. 15, 
February 20, 1915). Seems to belong to the Lower Sonoran life-zone. 
(See fig. 12.) 
Superfamily VIPEROIDEAE 
Family CROTALIDAE 
Crotalus oreganus Holbrook 
Pacifie Rattlesnake 
OrieinaL Description.‘ Crotalus oreganus Holbrook, N. Amer. 
Herpetology, Ist ed., 4, 1840, p. 115, pl. 29 [= 24]’’ (see Gill, Science, 
ser. 2, 17, 1903, pp. 910-912). 
Type Locaurry.—Columbia River. 
Synonyms.—Crotalus lucifer Baird and Girard, Proe. Acad. Nat. 
Sei. Phila., 6, 1852, p. 177 (types from Oregon and California) ; 
