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 Z. teniurus). 
1. Seven upper labials, third and fourth entering the eye ; 
ventrals 128, subeaudals 31 .... 1. pygmeus, 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. 
(. Eye moderate; ventrals 148-185, 
Anterior chin-shields as long as the poste- 
rior; subeaudals 03-57 5.0.2 cee eens 3. teniurus, p. 130. 
Anterior chin-shields shorter than the pos- 
terior; subcaudals 70 ........26..5. 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 
Bia THE MATIPUAIS |. nee) se a aw sce'e std a 8. melanotus, p. 134. 
B. Scales in 19 rows. 
1. Snout not pointed. 
pbenmdais: 40=63 (0. eis see cole ee oe 6. pecilogyrus, p. 131. 
PPC OOO) ah tar aha o. hn ci cle ace) w+, 2 «0 7. perfuscus, p. 133. 
2. Snout rather pointed ; rostral largely exposed above; sub- 
caudals 58-73. 
voting IVES ion Bee ae 9. almadensis, p. 134. 
Ventrals 169-197 ; uniform green above.. 10. viridis, p. 135. 
