40. THAMNOPHIS 



Distribution. — The range of this snake apparently ex- 

 tends over most of the Mexican plateau region and north 

 into southern Arizona and New Mexico. In Arizona, 

 authentic specimens have been taken near Tucson, Pima 

 County, and Hereford, Lewis Springs and Fairbank, Cochise 

 County. The species has been recorded also from Yuma, 

 and Fort Whipple, but these records need confirmation. In 

 New Mexico it has been taken at Duck Creek. 



Remarks. — Ruthven has shown that specimens from the 

 southern part of the Mexican plateau exhibit a decided tend- 

 ency toward a decrease in the number of scale-rows, uro- 

 steges, etc. Notwithstanding this he regards them all as 

 belonging to the same species as Arizonan specimens. This 

 opinion is followed here, as may be seen by reference to the 

 synonymy, but I feel that it may have to be revised later 

 when more material is at hand. 



193. Thamnophis angustirostris (Kennicott) 

 Brown-spotted Garter-Snake 



Eutcenia angustirostris Kennicott, Proc. Acad. Nat. Sci. Phila., i860, 



p. 332 (type locality, Parras, Coahuila, Mexico). 

 Chilopoma rufipunctatum Cope, in Yarrow, Rept. U. S. Expl. Surv. 



W. looth Merid., Vol. V, 1875, p. 544 (type locality, Southern 



Arizona). 

 Atomarchus multimaculatus Cope, Amer. Nat., 1883, p. 1300 (type 



locality, San Francisco River, New Mexico, near Arizona 



boundary.) 

 Stypocemus rujopunctatiis Cope, Proc. Amer. Philos. Soc. 1885, p. 387. 

 Eutcenia multimaculata Cope, Proc. Amer. Philos. Soc, 1885, p. 284; 



Cope, Proc. U. S. Nat. Mus., Vol. XIV, 1892, p. 665; Cope, Report 



U. S. Nat. Mus. for 1898, 1900, p. 1087; B.iown, Proc. Acad. Nat. 



Sci. Phila., 1901, p. 31. 

 Tropidonotus multimaculatus Boulenger, Cat. Snakes Brit. Mus., Vol. 



I, 1893, p. 214. 

 Tropidonotus rufopunctatus Boulenger, Cat. Snakes Brit. Mus., Vol. 



I, 1893, p. 214. 



