13. COLUBRIDM 



182. Thamnophis sirtalis infernalis (Blainville) 



Pacific Garter Snake 

 Plate 86 



Coluber infernalis Blainville, Nouv. Ann. du Mus., Vol. IV, 1835, p. 

 291, pi. XXVI, figs. 3-3a (type locality, California). 



Eutainia infernalis Baird & Girard, Cat. N. Amer. Rept., Pt. i, Serp., 

 1853, p. 26; Girard, U. S. Explor. Exped., Herp., 1858, p. 148, 

 pi. XIV, figs. Ii-i6; BocouRT, Bull. Soc. Zool. Fr., 1892, p. 40 

 (part). 



Eutitrtia sirtalis tetratania Cope, U. S. Explor. Surv. W. looth Merid., 

 Vol. V, 1875, p. 546 (part) (no locality); Townsend, Proc. U. S. 

 Nat. Mus., Vol. 10, 1887, p. 240; Cope, Proc. U. S. Nat. Mus., 

 Vol. XIV, 1892, p. 664 (Puget Sound, Wash., and Pitt River, 

 Cal.) (part); Cope, Report U. S. Nat. Mus. for 1898, 1900, p. 

 1080 (part). 



Eutania sirtalis parietalis Yarrow & Henshaw, Ann. Rep. Chief of 

 Engineers for 1878, Surv. W. looth Merid., Appendix NN, 1878, 

 p. 216; Cope, Proc. U. S. Nat. Mus., Vol. XIV, 1892, p. 664 (part); 

 Cope, Report U. S. Nat. Mus., 1898, 1900, p. 1077 (part); Ditmars, 

 Reptile Book, 1907, p. 237 (part). 



Tropidonottis sirtalis var. parietalis Garman, Mem. Mus. Compr. Zool., 

 Vol. VIII, No. 3, 1883, pp. 25, 139 (part). 



Tropidonotus ordinatus var. infernalis Boulenger, Cat. Snakes Brit. 

 Mus., Vol. I, 1893, p. 207 (part). 



Thamnophis parietalis Stejneger, N. Amer. Fauna, No. 7, 1893, p. 

 214; Van Denburgh, Occas. Papers Cal. Acad. Sci., Vol. V, 1897, 

 p. 200 (part); Grinnell & Grinnell, Throop Inst. Bull., No. 

 XXXV, 1907, p. 48. 



Thamnophis sirtalis parietalis Ruthven, Bull. U. S. Nat. Mus., No. 61, 

 1908, p. 166 (part); Grinnell & Camp, Univ. Cal. Publ. Zool., 

 Vol. 17, No. 10, p. 181 (part); Stejneger & Barbour, Check 

 List N. Amer. Amph. Rept., 1917, p. 103 (part). 



Thamnophis sirtalis infernalis Van Denburgh & Slevin, Proc. Cal. 

 Acad. Sci., Ser. 4, Vol. VIII, No. 6, 1918, p. 198; Van Denburgh 

 & Slevin, Proc. Cal. Acad. Sci., Ser. 4, Vol. XI, 1921, p. 29. 



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

 with narrow rounded snout, and temporal regions some- 

 times swollen. Eye large. Rostral plate large, bounded 



