75. LiopHis. 127 



by two strongly enlarged ones ; mandibular teeth 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 Species. 



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 L. tanlurus). 



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



ventrals 128, subcaudals 31 .... 1. pygmceus, p. 121K 



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. 



/3. Eye moderate ; ventrals 148-185. 



Anterior chin-shields as long as the poste- 



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



Anterior chin-shields shorter than the pos- 



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



6. 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. pofcifoj/yru*, p. 



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



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

 caudals 58-73. 



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



Ventrals 169-197; uniform green above. . 10. viru/w, p. 135. 



