210 CALIFORNIA ACADEMY OF SCIENCES. 



Sherwood's) Counties. In many parts of its range it 

 occurs with the T. parietalis. 



Habits. — Little known, but similar to those of T. pari- 

 etalis. 



69. — Thamnophis vagrans (Baird & Girard). Wander- 

 ing Garter Snake. 



Eutainia vagrana, B. & G., Cat. N. A. Eept., Pt. I, Serp., 1853, p. 35 



(type locality California); Girard, U.S. Explor. Exped., Herp., 



1858, p. 154, pi. XIV, figs. 5-10. 

 t Eutae.nia couchii, Kenx., U. S. Pac. E. E. Snrv., X, Pt. IV, 1859, 



p. 10 (type locality Pitt River, California). 

 Euicenia elegans lineolata. Cope, Proc. U. S. Nat. Mus., XIV, 1891, 



p. 655 (part) (no type). 

 Eutcenia elegans vagrans, Cope, Proc. U. S. Nat. Mus., XIV, 1891, 



p. 656. 

 Tropidonotus vagrans, BouL., Cat. Snakes Brit. Mus., I, 1893, 



p. 202. 

 Thamnophis vagrans, Stejn., N. A. Fauna, No. 7, 1893, p. 213. 



Description. — Head distinct from neck, flat-topped, 

 with narrow, rounded snout, and temporal regions 

 sometimes swollen. Rostral large, bounded behind by 

 internasal, anterior nasal, and first labial plates. Plates 

 on top of head, a pair of internasals, a pair of pre- 

 frontals, a frontal, supraocular of each side, and a pair 

 of parietals. Anterior and posterior nasals distinct. 

 One loreal. One preocular. Two to four postoculars. 

 Temporals normally one followed by two, sometimes 

 1-3. Eight superior and ten or eleven inferior labials, 

 sixth in each series largest, fourth and fifth superior 

 reaching eye, first j)air of inferior meeting on median 

 line. Two pair of geneials, posterior equal to or shorter 

 than anterior. Scales on body in twenty-one rows, all 

 keeled. Anal plate not divided. Gastrosteges varying 

 in number from one hundred and fifty-two to one hun- 

 dred and seventy-nine. Urosteges in two series of from 

 fifty-three to ninety-one. Eye moderate. 



