102 COLUBRID. 
than deep; one prwocular (sometimes divided) usually forming s. 
suture with the frontal, sometimes, however, narrowly separated 
from it; two (exceptionally one or three) postoculars; temporals 
243; eight (exceptionally nine) upper labials, fourth and fifth 
(or fifth and sixth) entering the eye; four or five lower labials in 
contact with the anterior chin-shields, which are as long as or 
shorter than the posterior. Scales in 19 rows. Ventrals 191-222; 
anal entire ; subcaudals 78-126 pairs. Coloration variable. 
Total length 910 millim. ; tail 220. 
Mexico, Central America, Tropical South America, 
A. Black above, with numerous (50-75) narrow yellow cross-bands,. 
the first on the nape; these bands sometimes interrupted in 
the middle. (C. petolarius, L.) 
a, ies! (V. 206; C. 102). Rosario de Cucuta, Mr. C. Webber [C.]. 
3d (V. 204; C. 117) Vana? Mr. D [C.] 
enezu Mr, Dyson [C.]. 
& ye. (V. 119 119; ©. 115). . 
d. 9° (V. 218; O. 89). Caracas, 
hy 3 (V.200; C. 89), British Guiana, 
nay mt ©. 104), & 
gr. (V. 197; C. 83). 
it i. = (V. 103 C.94) & Demerara. Mr. Snellgrove [C.]. 
Q (V. 211; ©). 
k. 2 (V. 208; C. 87). Berbice 
l. 2 (V. 200; C. 92). Surinam P Lidth de Jeude Coll. 
B. Light cross-bars (sometimes reduced to large spots on the sides) 
fewer (15-25) and far apart. 
V. 209; C.115), Guayaquil. Mr. Fraser (Gi 
i Xe. { . 202 ; 0. 116) Ecuador. Mr. Buckle 
o-d, e, f. . Her. 9 (V.212, Moyobamba, N.E. Mr. A. H. ff (C.}. 
208, 205 ; C. 100, 121, eru. 
101) & yg. (V. 216; ‘C, 
119). 
g- 3 (V. 209; C. 126).  Sarayacu,N.E. Peru. Mr. W. Davis [C.]; 
h-t. 9 (V. 222; eee 4 Dr sed 
urimaguas, Huallaga ahne 
yg. (V. 210; 6501 ). am dope: 
k. do (V. 214; C. 115). —— Pebas. H.W. Bates, Esq.[C 
l. Hgr. (V. 208 ; ©. 89). Pernambuco. Mf Py For bes, e 
m. Yg. (V.191; C.101). Bahia. ; 
n. Hgr. (V.203; C. 109). Bahia. Dr. O. Wucherer [C.]. 
C. prac § dark brown above, or with faint traces of light bars 
as in 
a. 2 (V. 220; C. 97). merce N.E. Mr. A. H. Roff[0.]. 
6. 2 214; C. 98). Yungas, Bolivia. 
as YY. 202; C. 100). aaron uco, 
