118 VENOMS 
which may form a zigzag band ; belly whitish, uniform or spotted 
with dark brown. 
Total length, 800 millimetres ; tail 90. 
Habitat : Mexico and Central America. 
(13) L. godmani.—Snout broad, rounded ; 9 or 10 supralabials ; 
scales in 21 rows, strongly keeled; 135—142 ventrals; 22—34 
subcaudals in a single row. 
Colour brown, with or without a dorsal series of large darker 
spots; belly yellowish, more or less spotted with grey or blackish. 
Total length, 610 millimetres ; tail 60. 
Habitat : Guatemala. 
(14) L. lansbergii.—Snout pointed, turned up at the end, as in 
Vipera aspis ; scales in 25—27 rows, strongly keeled; 152—159 
ventrals ; 29—35 subcaudals in a single row. 
Colour yellowish-brown, pale brown, or grey, with a dorsal 
series of large rhomboidal or squarish spots, usually divided by a 
narrow yellow or orange vertebral line; cheeks blackish ; belly 
powdered with brown, with or without whitish spots. 
Total length, 575 millimetres ; tail 70. 
Habitat : from Southern Mexico to Colombia, Venezuela, 
and Brazil. 
(15) L. brachystoma.—Sinilar to the foregoing species ; scales 
in 23 (rarely 25) rows; 132—150 ventrals ; 27—38 subcaudals. 
Total length, 500 millimetres ; tail 50. 
Habitat : Southern Mexico and Central America. 
(16) L. bilineatus.—Snout rounded ; 7 or 8 supralabials ; scales 
in 27—35 rows, strongly keeled; 198—218 ventrals; 59—71 
subcaudals, all or majority in two rows. Tail prehensile. 
Colour green, uniform or spotted with black; a lateral yellow 
streak ; belly white ; end of tail reddish. 
Total length, 840 millimetres ; tail 125. 
Habitat : Brazil, Bolivia, Peru, Ecuador. 
(17) L. undulatus.—Snout short, rounded; 11 supralabials ; 
scales in 21 rows, the dorsals strongly or very strongly keeled ; 
149—171 ventrals ; 41—49 pairs of subcaudals. Tail prehensile. 
