THE PBINCIPAL 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) L. hicolor. — 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 miUimetres; 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. 



