226 COLUBRID&. 
Tropidonotus baronis-miilleri, Troschel, in Miill. Reis, Mexico, iii. 
p- 610 (1865), 
Eutenia melanogaster, Cope, Proc. Am. Philos. Soc. xxii, 1885, 
386. 
estes mesomelana, Cope, Bull. U.S. Nat. Mus, no. 32, p.74 (1887) ; 
Duges, La Naturaleza, (2) i. 1888, p. 130. 
Eye rather small. Rostral broader than deep, visible from above ; 
internasals as long as broad or longer, subtriangular, truncate in 
front, as long as the prefrontals; frontal once and two thirds to 
twice as long as broad, as long as or longer than its distance from 
the end of the snout, a little shorter than the parietals; loreal 
longer than deep; two (rarely three) pre- and two or three (rarely 
four) postoculars; temporals 142 or 1+3; eight upper labials, 
fourth and fifth entering the eye; five (rarely four) lower labials in 
contact with the anterior chin-shields, which are shorter than the 
posterior. Scales in 19 rows, strongly keeled, outer row perfectly 
smooth or faintly keeled, second smooth or feebly keeled. Ventrals 
140-159; anal entire; subcaudals 45-79. Olive-brown above, 
without or with very small black spots; a more or less distinct pale 
lateral stripe running along the second or second and third rows of 
scales; throat yellowish; belly and lower surface of tail black in 
the middle, olive or plumbeous on the sides, or pale greyish with a 
median series of more or less confluent small black spots. 
Total length 580 millim.; tail 140. 
Mexico. 
af. gd (V. 159, 152, Mexico. 
154, 155; C. 71, 67, 
62, ’68), "9 (V.. 150; 
nh) 5), & her. (V. 152; 
gy. 3 (V. 152; C. 66), Plateau of Mexico, P. Geddes, Esq. [P.]. 
© (V. 150; 0. 55), & near the city. 
yg. (V. 149; C. 64). 
k. Q2(V.140; C. 71). La Laguna, Juana- Dr. A. C. Buller [C.}. 
catlan, Jalisco, 
6500 feet. 
Lm. 9 (V. 148; C.63) Colonia Brizuela, Dr. A. C. Buller [C.}. 
& yg. (V.153; C. 79). Hacienda El 
Rosario, Autlan, 
Jalisco. 
n,o. 3 (V.156, 156; C, Tehuantepec. 
66, 66). 
p. Yg. (V. 142; C. 66). W. Mexico. 
26. Tropidonotus levissimus. 
Natrix levissima, Giinth. Ann. §& Mag. N. H. (8) ix. 
_ pl. ix. fig. 4. 
7 
