OPH1DIA— COLUBEIDAE— HETEEODON SIMUS NAS1CUS. 



555 



above, with only a trace of the lateral band in front, and having a red 



throat. 



EUTAENIA MAECIANA, Baird & Girard. 



Eutaenia marciana, Baird & Gieaed, Cat. N. A. Kept., pt. i, Serp., 1853, 36. — Bd., 

 U. S. & Mex. Bound. Surv., ii, Eeptiles, 1855, 17.— Cope, Cbeck-List N. A. 

 Batrach. & Kept., 1875, 41. 

 Hab. — Arkansas, Texas, and entire Eio Grande Valley. 



This beautiful species was found to be exceedingly abundant in the 

 valley of the Rio Grande in New Mexico. When taken, it discharges from 

 the small glands situated near the anus a secretion of a peculiarly unpleas- 

 ant odor, and this fact has also been noticed in regard to all the serpents of 

 this genus. 



No. 



Locality. 



Date. 



Collector. 



Y Y 



«LS 



2L5 



3 1-5 

 109 



1-53 

 362 E 

 362 E 1 





Aug., 1S74 

 .... do 



Dr. II. C. Yarrow. 

 Dr. O. Loew. 



Do. 



Do. 

 Dr. H. C. Yarrow. 

 Dr. 0. Loew. 

 C. E. Aiken. 



Do. 





Ao 



....do .... 



do 



....do. ... 



Taos, N. Mex 



....do 





Sept., IS74 

 Oct , 1874 

 .... do 





do 







Genus HETERODON, Beauvois. 



HETERODON SIMUS, Liuu., subspecies NASIOUS, Baird & Girard. 



Heterodon na&iem, Baird & Girard, Stans. Eep. Exp. Great Salt Lake, 1852, 352. — 

 lid., Marcy's Eep. Exp. Eed Eiv., 1852, 208.— lid,, Cat. N. A. Eept., pt. 1, Serp., 

 1853, 61-157.— Hallow., Sitgreave's Eep. Zuni & Col. Eiv., 1853, 117.— Id., 

 Proc. Acad. Nat. Sci. Phila., 1S56, 249.— Bd., P. E. E. Eep., x, 1859, 41.— 

 Id., U. S. & Mex. Bound. Surv., ii, Eept., 1859, 18.— Hayd., Trans. Am. Phil. 

 Soc, xii, 1862, 177.— Cope, Proc. Acad. Nat. Sci. Phila., 1866, 307.— Allen, 

 Proc. Bost. Soc. Nat. Ilist., xvii, 1874, 69. 



Heterodon simtts Linn., subspecies naswus, Baird & Girard, Cope, Cbeck-List N. A. 

 Batrach. & Eept., 1875, 43. 



Dab. — Souoran and Central Subregions and Texas. 



Very common, and greatly dreaded by the settlers in the West, who 

 call them "Sand Vipers", notwithstanding they are entirely harmless. One 

 specimen taken of unusually large size. 



