390 COLUBRID. 
Herpetodryas psammophis, Schleg. Phys. Serp. ii. p. 195 (1837), and 
“Abbild. pl. shiv. fig. 21-24 (ied). ) 
Psammophis flagelliformis, Holbr. N. Am. Herp. (2nd ed.) iv. p. 11, 
l. ii. (1842). 
— flavigularis, Hallow. Proc. Ac. Philad. 1852, p. 178, and in 
Sitgreave’s Exped. Zuni § Colorado Riv. p. 131, pl. xi. (1858). 
Masticophis flagelliformis, Baird § Gir. Cat. N. Am, t. p. 98 
(1853) ; Jan, Icon. Gén. 20, pl. vi. (1867). 
—— flavigularis, Baird § Gir. 1. c. p. 99, and in Marcy’s Explor. 
Red Riv. p. 230 (1853). 
Herpetodryas flagelliformis, Dum. § Bibr. vii. p. 210 (1854); Giinth. 
Cat. p. 118 (18658). 
—— flavigularis, part., Giinth. 1. ¢. p. 118. 
Drymobius flagelliformis, Cope, Proc. Ac. Philad, 1360, p. 561. 
. —— testaceus, Cope, 1. c. 
Bascanium flagelliforme, Cope, Check-List N. Am. Rept. p. 40 
(1875), and Proc. U.S. Nat. Mus. xiv. 1892, p. 6265. 
—- — bicinctum, Yarrow, Proc. U.S. Nat. Mus. y. 1883, 
p. 153. 
P Bascanium piceum, Cope, Proc. U.S. Nat. Mus. xiv. 1892, p. 626. 
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 much shorter than the pra- 
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 preocular, with a subocular below it; two 
postoculars ; temporals 2+2 or 243; 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; subcaudals 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. d (V.187 ©. 112). Brownsville, Texas. . Smithsonian Instit. 
b-c. 9, skin (V. 199; Duval Co., Texas. W ‘taylor, Esq. 
C. 92), & head. [C.]. 
d. 3; a (V. 194; Texas. 
C. 109). 
e. Yg., skin (V. 182; Nuevo Leon. W. Taylor, Esq. 
0.107). yee Or ya 
f. 2 (V. 202; C. 110). N. America. ay Sci Esq. 
9. Zamenis teniatus. 
Leptophis teniata, Hallow. Proc. Ac. Philad. 1852, p. 181, and in 
itgreave’s Exped. Zuni § Colorado Riv. p. 133, pl. xii. (1858), - 
