536 VIPERID. 
pair of large internasals, usually forming a suture with each other, 
and a large canthal; two or three postoculars and one, two, or three 
suboculars, separated from the labials by one or two series of scales ; 
temporal scales keeled ; seven or eight upper labials, second forming 
the anterior border of the loreal pit. Scales in 23-33 rows, sharply 
keeled. Ventrals 180-240; anal entire, subcaudals 46-70, all or 
greater part in two rows. "Coloration very variable: grey, brown, 
yellow, olive, or reddish above, uniform or with more or less distinct 
dark spots or cross-bands, or with dark triangles on the sides in- 
closing pale rhombs; a dark streak from the eye to behind the 
angle of the mouth ; lower parts yellowish, uniform or powdered or 
spotted with brown, or brown with light spots. 
Total length 1600 millim.; tail 190. 
Tropical America. 
a-b, 2 (Sc. 27; V. 209; Atoyac, Guerrero. Mr. H. H. Smith Os 
C. 62) & her. (Sc. 27 ; F. D, Godman, 
V. 208; C. 61). 
é. BLS (Se. 29; V. 212; Teapa, Tabasco. F. D. Godman, Esq. 
& of 
d Sé of . 26; V. 214 ; Tehuantepec. M. F, Sumichrast [C.]. 
). 
e,f,9g. 2 (Se. 27, 27,27; Mexico. Mr. Hugo Finck [C.]. 
V. 220, 213, 221; 6.58, | ? 
67, 60), 
at (Se. 27; V.210; Mexico. 
l. g (Se. 25; V. 212; Pacific Coast of 0. Salvin, Esq. [C.]. 
. 62) Guatemala. 
fi)’ X36. 25; V. 195; Vera Paz. O. Salvin, Esq. [C.}. 
g: XS 25; V. 189 Stann Creek, Brit. Rev. J. Robertson [0.]. 
C.71). Honduras. 
o. Yg. (Se. 27; V. 210; Honduras, 
C. 69). 
p. eae 33 ; Vv. 226; Guadeloupe. 
q. 2 (Se. 27; V. 211; Dominica. . G. A. Ramage, ‘ 
0. oer [C.]. 5 
r, 8, t. (Se. 30, Martinique. 
29; V. eO17, 220, Pty 
C. 67, 69, 65). 
u. tak Se. 97; V. 218; St. Lucia. Lady Wood [P.}. 
v, a ee 25; V. 200; St. Lucia. Zoological Society. 
m, 
n. 
"6. d (Se. 23; Y. 191; Venezuela. 
s. ce 355 25; V. 197; Caracas. 
a. of af 29; V. 214; Berbice. Col. Sabine (T 
65). of B. port 4 are 
