224 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



fourteen per cent only of the specimens have two preoculars on 

 one or both sides of the head. Snakes of the T. o. vagrans 

 type occur in portions of the area occupied by T. o. ordinoidcs, 

 and often have two preoculars. There seems to be no good 

 reason for calling them T. o. ordiuoides. It appears much 

 more logical to consider them T. o. bisciitatiis, as was done in 

 1897, although specimens to show the continuity of range from 

 the Klamath Lakes to Puget Sound are not at hand. 



Thamnophis ordinoides atratus (Kennicott) 

 Coast Garter-Snake. 



Diagnosis. — Normally with eight supralabials and ten infra- 

 labials. Scales usually in nineteen, sometimes in twenty-one, 

 rows. Gastrosteges average more numerous than in T. o. 

 ordinoides, but fewer than in the other subspecies. Coloration 

 very variable, striped, spotted, or (rarely) unicolor, often with 

 some red. Preocular usually single. Size larger than T. o. 

 ordinoides. 



Type Locality. — California. (Brown states that the same 

 specimens served as the types of Cope's E. i. vidua, and that 

 they are labeled San Francisco. ) 



Synonyms. — EufcEnia infernalis of many authors but not of 

 Blainville. Entceiiia infernalis vidua Cope, 1892; type locality 

 San Francisco, California. 



Range. — This subspecies occupies the coast region of Cali- 

 fornia from Del Norte to Santa Barbara counties. So far as 

 known, the area inhabited by it includes the coast ranges and 

 their valleys but not the great valleys of the Sacramento and 

 San Joaquin, It occurs in both the Transition and Upper 

 Sonoran zones. 



We have examined specimens from the following locali- 

 ties : — 



1. Near Siskiyou, Jackson Co., Oregon, 



2, Gasquet, Del Norte Co., California, 



3. Trinidad, Humboldt Co., Cal, 



4, Eureka, Humboldt Co,, Cal. 



