230 COLUBRID, 
eee,  iaumeas apiata, Cope, Journ. Ac. Philad, (2) viii- 
p- 142. 
Chilomeniseus mexicanus, Cope, Bull. U.S. Nat. Mus. no. 82, 1887, 
p- 81. 
Snout short, obtusely pointed, prominent. Rostral large, broader 
than deep, the portion visible from above measuring one half to two 
thirds, or even equal to, its distance from the frontal; internasals 
as long as ora little shorter than the prefrontals ; frontal once and 
one third to once and a half as long as broad, as long as or longer 
than its distance from the end of the snout, as long as or a little 
longer than the parietals; loreal, if present, small, if absent fused 
with the posterior nasal or with the prefrontal; one pre- and two 
postoculars; temporals 142 (rarely 243 or 4); seven upper 
labials, third and fourth entering the eye; three (rarely four) 
lower labials in contact with the anterior chin-shields, which are 
longer than the posterior. Scales in 17 rows. Ventrals 136-174; 
anal divided; subcaudals 28-49. Coloration very variable. 
Total length 750 millim.; tail 100. 
Mexico to Ecuador. 
A. Belly more or less spotted with blackish; upper parts brown 
with more or less distinct darker spots and irregular cross- 
bars; these markings may entirely disappear in the adult, 
which is then uniform dark brown above. 
a. 3 (V. 148; C. 43). Mexico. 
b-e. 2 &é 156, 161; Atoyac, Vera Cruz. Mr.H.H.Smith(C.]; 
C. 33, 33). F, D. Godman, Esq, 
Fails 
d. 9 (V. 159; C. 83). Vera Paz, Low of Stvin, Esq. [C.]. 
Forest. 
e. do (V. 141; C. 42), Pacific Coast of O. Salvin, Esq. [C.]. 
f. 2 (V. 160; 0.381) Freie R. A. Rix, Esq. [C.] 
, oy. ; 0.81). . ontales ica- . A. Rix, Esq. [C.]; 
: ragua, ; Teg a A aia 
g. 2 (V. 158; 0.?). Cartago; Costa Rica, - ‘eb. 
hk. 3 (V. 136; C. 40). Buenaventura, Co- Mr. W.F.H. Rosen- 
lombia. berg [C.]. 
i-k. Yg. Ne 152, 145; Zaruma, Ecuador. J. 0] unter, Esq. 
9). oe 
B. Belly uniform yellowish ; back pale brown. 
a. With five black longitudinal lines on the back. 
a. 3 (V. 162; C. 40). Mexico. 
b. Hgr. (V.171; 0.32). Jalapa, Mexico. Mr. Hoege ae 
ce 9 (V.171; C. 31). Plain of Zacapa, O, Salvin, Esq. [C.]. 
Guatemala. 
b, A feebly-marked blackish vertebral line and a black streak 
behind the eye. 
d. g (V. 157; C. 40). Putla, Mexico, 
