lad 
57. DRYMOBIUS. 17 
than deep; one pre- and two postoculars; temporals 2+2; nine 
upper labials, fourth, fifth, and sixth entering the eye; five lower 
labials in contact with the anterior chin-shields, which are shorter 
than the posterior. Scales in 17 rows, dorsals keeled. Ventrals 
158-169 ; anal divided; subcaudals 114-117. Green above; ven- 
trals yellow in the middle, green on the sides; young sometimes 
with black cross bars. 
Total length 1280 millim, ; tail 400. 
Guatemala. 
8. Drymobius margaritiferus. 
Herpetodryas margaritiferus, Schleg. Phys. Serp. 1. p. 184 (1837), 
and Abbild. pl. xliv. figs, 19 & 20 (1844). 
Leptophis marvaritiferus, Dun. § Bibr. vii. p. 589 (1854). 
Zamenis tricolor, Hallow. Journ, Ac. Philad. (2) iii. 1855, p. 34, 
1. iii. 
Dioiens margaritiferus, Grnth, Cat. p. 126 (1858); Salvin, Proce. 
Zool. Soc, 1860, p. 456. 
Drymobius margaritiferus, Cope, Proc. Ac. Philad. 1860, p. 561; 
Bocourt, Miss. Se. Mex., Rept. p. 716, pl. xlix. fig. 2 (1890) ; 
Stejneger, Proc. U.S. Nat. Mus. xiv. 1891, ie As 
Thamnosophis margaritiferus, Jan, Elenco, p. 82 (1863), and Icon, 
Gén. 31, pl. vi. fig. 3 (1869) ; Dugés, La Na furaleca: (2) i. 1888, 
p- 182. 
Drymobius margaritiferus, var. occidentalis, Bocourt, J. c. p. 718. 
Maxillary teeth 24 or 25, posterior strongly enlarged. Rostral 
broader than deep, visible from above ; internasals shorter than the 
prefrontals ; frontal once and a half to once and three fourths as 
long as broad, as long as its distance from the rostral or the end of 
the snout, as long as or slightly shorter than the parietals; loreal 
longer than deep; one przocular, not touching the frontal ; two or 
three postoculars; temporals 2+2,; nine upper labials, fourth, 
fifth, and sixth entering the eye; five (rarely four) lower labials in 
contact with the anterior chin-shields, which are shorter than the 
posterior. Scales more or less distinctly keeled, in 17 rows. Ven- 
trals 144-159; anal divided; subeaudals 101-126. Black above, 
each scale green at the base and with a yellow elongate spot or 
longitudinal streak ; head pale brown or olive above, black on the 
temples ; ; labials yellow, with black sutures ; ventrals and subcaudals 
yellow, black-edged. 
Total length 1260 millim, ; tail 430. 
From South-western Texas and Mexico to Colombia and Vene- 
zuela. 
a-h, 3 (V. 153, 154, 154, Mexico. Hr. Hugo Finck [C.]. 
162 lal, 2, 2) & 
9 (Vv. 152, 154, 151, c 
151 5 Carne 07, 120) 
i. 5 (V. 1485 Colla). Mexico. M. Sallé [C.}. - 
k. 9 (V.1465>@7 2). Presidio, nr. Mazatlan, Hr. A. Forrer [C.]. 
1. Yg. (V. 151; C.122). Jalapa. Hr. Hoege [C. }. 
VOL, Il. Cc 
