Vou X] VAN DENBURGH— VARIATION IN GOPHER-SNAKES 13 



Pituophis catenifer catenifer (Blainville) 

 Gsast Gopher-Snake 



Diagnosis. — Gastrosteges average fewer than 225 ; urosteges 

 average 64 to 70; scale- rows most frequently 31; preoculars 

 usually two ; supralabials most frequently eight ; dorsal blotches 

 numerous, average on body 70, on tail 21.4; no red in colora- 

 tion. 



Type locality. — California. 



Distribution. — The Coast Gopher-Snake occupies a rather 

 narrow strip of territory along the Pacific Coast of the United 

 States from Puget Sound to Santa Barbara County, California. 

 The eastern limit of its range in the far north is not known, but 

 does not include eastern Washington. 



In southern Oregon, it occurs near Roseburg and in the 

 Camas Mountains, in Douglas County, but not near Klamath 

 Falls, Klamath County, where it is replaced by P. catenifer 

 heermanni. 



In California, it occupies the coast ranges and valleys east to 

 the western edges of the Sacramento and San Joaquin valleys, 

 where it intergrades with and, farther east, is replaced by, 

 P. catenifer heermanni in the north and P. catenifer deserticola 

 in the south. Still farther south, it probably intergrades with 

 P. catenifer annectens in Santa Barbara or Ventura County. 

 It has been taken in Siskiyou (Ft. Jones, Callahan, Mt. Shasta), 

 Humboldt (Garberville), Trinity (Yolla Bolly Mountain), 

 Mendocino (ten miles south from Willits), Lake (Middletown, 

 Kelseyville, Lower Lake), Sonoma (Petaluma, Duncan Mills, 

 Guerneville, Monte Rio), Napa (Napa), Solano (Buddha Can- 

 yon), Marin (Inverness, Point Reyes Station, Mailliard, Mt. 

 Tamalpais, Lagunitas, Manzanita, San Anselmo), Contra 

 Costa (Walnut Creek, Antioch, Contra Costa, San Pablo Val- 

 ley, Mt. Diablo, Moraga Valley), Alameda (Berkeley, Oak- 

 land, Hayward), San Francisco, Santa Clara (Palo Alto, 

 Stanford University, Sunnyvale, San Jose, Los Gatos, Alma, 

 Coyote, Coyote Creek), Santa Cruz (Glenwood, Corralitos, 

 Soquel), San Benito (San Juan), Monterey (Monterey, Car- 

 mel, Bradley, Soledad, Coburn, Welby, Metz), San Luis 

 Obispo (San Miguel, Pismo, Edna, Indian Creek, San Juan 



