THE PRINCIPAL SPECIES OF POISONOUS SNAKES 119 
Colour olive or brown, sometimes speckled with black, with a 
dorsal series of rhomboidal dark spots or an undulous or zigzag 
band ; belly yellowish or brownish, powdered with blackish. 
Total length, 570 millimetres ; tail 75. 
Habitat : Mexico. 
(18) L. lateralis.—Snout rounded ; 9 supralabials ; scales in 21 
or 23 rows, rather strongly keeled; 171 ventrals ; 59 subcaudals, in 
a single row. Tail prehensile. 
Colour green, with a yellow line on each side of the body. 
Total length, 485 millimetres ; tail 75. 
Habitat : Costa Rica. 
(19) LZ. bicolor.—Very similar to the foregoing; scales in 21 
rows ; 164—-167 ventrals ; 62—67 subcaudals, in a single row. 
Colour uniform green, yellowish on the belly. 
Total length, 375 millimetres ; tail 60. 
Habitat : Guatemala. 
(20) L. schlegelii.—Snout rounded ; 8 or 9 supralabials ; scales 
in 19—25 rows, more or less strongly keeled ; 138—162 ventrals ; 
47—62 subcaudals, in a single row. Tail prehensile. 
Coloration very variable, green or olive, spotted with black, or 
with pinkish, reddish, or purplish black-edged spots or cross-bars ; 
belly yellow, spotted with green, or variegated ; end of tail generally 
red. 
Total length, 600 millimetres ; tail 115. 
Habitat : Central America, Colombia, Ecuador. 
(21) L. nigroviridis.—Snout short, rounded ; 9—11 supralabials ; 
19 rows of scales, rather feebly keeled ; 134—146 ventrals ; 49-—54 
subcaudals, in a single row. Tail prehensile. 
Colour green or olive, spotted with black ; head with a black 
streak on each side ; belly yellowish. 
Total length, 535 millimetres ; tail 90. 
Habitat : Costa Rica. 
(22) L. aurifer.—Snout short and broad; 9 or 10 supralabials ; 
scales in 19 rows, rather strongly keeled; 154—158 ventrals ; 
53—61 subcaudals, single. Tail prehensile. 
