390 COLUBEIDJ!!. 



Herpetodryas psammnphis, Schleg. Phys. Serp. ii. p. 195 (1837), and 



Abbild. j)l. xliv. figs. 21-24 (1844). 

 Psammophis flageUiformis, Holbr. N. Am. Herp. (2nd ed.) iv. p. 11, 



pi. ii. (1842). 

 flavigularis, Halloiv. Proc. Ac. Philad. 1852, p. 178, and in 



Sitgreave^s Exped. Zuni §■ Colorado Riv. p. 131, pi. xi. (1853). 

 Masticophis flageUiformis, Baird ^ Oir. Cat. N. Am. Rept. p. 98 



(1853) ; Jan, Icon. Gen. 20, pi. yi. (1867). 

 flavigularis, Baird ^ Oir. I. u. p. 99, and in Marcy's Explor. 



Red Riv. -p. 230 (1853). 

 Herpetodryas flageUiformis, Bum. S, Bibr. vii. p. 210 (1854) ; Gunth. 



Cat. p. 118 (1858). 



flavigularis, part., Gilnth. I. c. p. 118. 



Drymobius flageUiformis, Cope, Proc. Ac. Philad. 1360, p. 561. 



testaceus, Cope, I. c. 



Bascanium flagelliforrae. Cope, Check-List N. Am. Rept. p. 40 



(1875), and Proc. U.S. Nat. Mm. xiv. 1892, p. 025. 

 flagelliforme bicinctum. Yarrow, Proc. U.S. Nat. Mus. v. 1883, 



p. 153. 

 ? Bascanium pioeum. Cope, P-oc. U.S. Nat. Mus. xiv. 1892, p. 625. 



Snout rather prominent. Rostral nearly as deep as broad, the 

 portion visible from above one third or one half as long as its 

 distance from the frontal ; internasals mnoh shorter than the prse- 

 frontals ; frontal not, or but slightly, broader than the supraocular, 

 once and a half to once and two thirds as long as broad, as long as 

 or a little longer than its distance from the end of the snout, as long 

 as or slightly shorter than the parietals ; loreal nearly as long as 

 deep or deeper ; one prseocular, with a subocular below it ; two 

 postooulars ; temporals 2 + 2 or 2 + 3; eight upper labials, fourth 

 and fifth entering the eye ; four or five lower labials in contact with 

 the anterior chin-shields ; posterior chin-shields as long as or longer 

 than the anterior, and separated from each other by scales. Scales 

 smooth, in 17 (or 19 ?) rows. Ventrals obtusely angulate, 182- 

 211 ; anal divided ; suboaudals 80-112. Yellowish brown to black 

 above, yellow inferiorly ; gular and anterior ventral regions usually 

 with two brown or reddish stripes or series of spots. 



Total length 1700 millim. ; tail 380. 



Southern United States and North Mexico. 



a. (S (V. 187 C. 113). Brownsville, Texas. Smithsonian Instit. 



b-c. 5 , skin (V. 199 ; Duval Co., Texas. W. Taylor, Esq. 



C. 92), & head. [0.]. 



d. d' , skin (V. 194 ; Texas. 

 0. 109). 



e. Yg., skin (V. 182 ; Nuevo Leon. W. Taylor, Esq. 

 0. 107). [C.]. 



f. $ (V. 202; 0. 110). N. America. E. Douhleday, Esq. 



[P.]. 



9. Zamenis tSBuiatus. 



Leptophis tseniata, Sallow. Proc. Ac. Philad. 1852, p. 181, and in 

 Sitgreave's Exped. Zuni Sf Colorado Riv. p. 133, pi. xii. (1853). 



