75. LioPHis. 127 



by two strongly enlarged ones ; mandibular teetb subequal. Head 

 slightly distinct from neck ; eye moderate or rather large, in one 

 species rather small, with round pupil. Body cylindrical ; scale 

 smooth, with apical pits, in 17 or 19 rows ; ventrals not or but 

 obtusely angulate laterally. Tail moderate or long ; subcaudals in 

 two rows. 



South and Central America, West Indies, South-eastern North 

 America. 



Synopsis of the Sjpecies. 



I. Tail 4 to 7 times in the total length ; eye moderate or rather 

 small, its length not twice its distance from the oral border. 



A. Scales in 17 rows (exceptionally 19 in £. tceniurus). 



1. Seven upper labials, third and fourth entering the eye ; 



ventrals 128, subcaudals 31 ... . 1. pygmcBus, p. 129. 



2. Eight upper labials, fourth and fifth entering the eye. 



a. Internasals as long as broad. 



a. Eye rather small ; ventrals 187-195. 



2. triscalis, p. 129. 



jS. Eye moderate ; ventrals 148-185. 



Anterior chin-shields as long as the poste- 

 rior ; subcaudals 53-57 3. tmniurus, p. 130. 



Anterior chin-shields shorter than the pos- 

 terior ; subcaudals 70 5. fraseri, p. 131. 



h. Internasals broader than long. 



Frontal once and a half as long as broad, 



shorter than the parietals 4. albiventris, p. 130. 



Frontal once and two thirds to twice as 



long as broad, as long as or a little shorter 



than the parietals 8. melanotus, p. 134. 



B. Scales in 19 rows. 



1. Snout not pointed. 



Subcaudals 40-63 6. pmdlogyrus, p. 131.- 



Subcaudals 75-80 7. perfuscus, p. 133. 



2. Snout rather pointed ; rostral largely exposed above ; sub- 



caudals 58-73. 



Ventrals 149-168 9. almadensis, p. 134. 



Ventrals 169-197; uniform green above. . 10. viridis, p. 135. — 



