DIPSADOMORPHIN &. 29 
tt Maxillary teeth 9 or 10, increasing in length ; 
anterior mandibular teeth strongly enlarged ; 
eye small. 158. Hemirhagerrhis, p. 119. 
** Scales without pits; maxillary teeth 15, equal; 
anterior mandibular teeth strongly enlarged. 
159. Manolepis, p. 120. 
C. Solid maxillary teeth subequal or increasing in length to 
the last; head more or less distinct from neck; pupil 
round or horizontal; scales with apical pits. 
1. Solid maxillary teeth 10 or more, separated from the 
grooved fangs by an interspace. 
a. Pupil round. 7 
a. Anterior mandibular teeth not enlarged; nasal 
entire or semidivided. 
Maxillary teeth gradually increasing in size. 
162. Amplorhinus, p. 124. 
Maxillary teeth equal ........ 163. Pseudablabes, p. 126. 
3. Anterior mandibular teeth enlarged. 
Maxillary teeth subequal; scales more or less oblique; nostril 
between two nasals ........ 164. Philodryas, p. 127. 
Last solid maxillary tooth very large, fang-like. 
165. Ialtris, p. 137. 
Maxillary teeth subequal; nostril between two nasals and the inter- 
BAGG ss davies chy iivves und 166. Trimerorhinus, p. 138. 
Maxillary teeth subequal; nostril in a single or divided nasal ; 
scales more or less distinctly grooved. 
167. Colopeltis, p. 141. 
6. Pupil horizontal ; scales very oblique ; body compressed. 
176, Thelotornis, p. 184. 
2. Solid maxillary teeth 17 to 20, not separated from the 
grooved fangs, which are feebly enlarged; scales more 
or less oblique; body compressed. 
Ventrals rounded; pupil round . 178. Oxybelis, p. 189. 
Ventrals and subcaudals with suture-like lateral keel; pupil 
margontal tle decane cs hx cose 179. Dryophiops, p. 193. - 
Ventrals and subcaudals with suture-like lateral keel ; pupil round, 
180. Chrysopelea, p. 195. 
3. Solid maxillary teeth 4 to 9; grooved fangs very large. 
Eye large; scales oblique...... 160. Tomodon, p. 120. 
Eye moderate ; scales forming straight longitudinal series. 
168. Rhamphiophis, p. 144. 
Eye extremely large ; scales very oblique. 
, 177. Dispholidus, p. 186. 
