452 AMBITCEPHALir^. 



5. leptognathus brevifacies. 



Tropidodipsas brevifacies, Cope, Proc. Ac. Philad. 1866, p. 127. 

 Leptognatius bievifacies. Cope, Proc. Ac. Philad. 1868, p. 108. 

 Dipsadomoms fasciatus, Bocourt, Bull. Soc. Philom. (7) viii. 1884, 



p. 135. 

 Leptognathus torquatus, Cope, Proc. Amer. Philos. Soe. xzu. 1885, 



p. 172. 



Eye large. Nasal divided ; loreal usually entering the eye ; one 

 or two prseoculars ; three postoculars ; nine or ten upper labials, 

 fourth and fifth entering the eye; two anterior pairs of lower 

 labials in contact with each other behind the symphysial; four 

 pairs of chin-shields. Scales in 15 rows, vertebrals scarcely 

 enlarged. Yentrals 162-171 ; anal entire ; subcaudals 86-89. 

 Black, with narrow whitish annuli. 



Total length 153 miUim. ; tail 57. 



Tuoatan. 



6. Leptognathus andiana. (Piatb XXIII. fig. 2.) 



Body strongly compressed. Eye large. Rostral broader than 

 deep, scarcely visible from above ; internasals half as long as the 

 prsefrontals ; frontal as long as broad, as long as its distance from 

 the end of the snout, shorter than the parietals; nasal divided; 

 loreal as long as deep, bordering the eye ; no praeocular ; prsefrontal 

 entering the eye ; two postoculars ; temporals 2 + 3 ; eight upper 

 labials, third and fourth entering the eye ; first lower labial in 

 contact with its fellow behind the symphysial ; two pairs of chin- 

 shields, first as long as broad. Scales in 15 rows, vertebrals 

 strongly enlarged, the largest twice as broad as long, many divided 

 into two. Ventrals 184 ; anal entire ; subcaudals 82. Yellowish 

 above, with interrupted fine black longitudinal lines ; large verti- 

 cally elliptic black, white-edged blotches on the side extending to 

 the vertebral line and alternating with those on the other side ; a 

 large p -shaped black marking on the head; lower parts uniform 

 white. 



Total length 255 millim. ; tail 60. 



Ecuador. 



«. Yg.(V. 184; 0.82). Quito. 



7. Leptognathus elegans. (Plate XXIII. fig. 3.) 



Leptognathus mikanii (nan ScMeg.), Giinth. Biol. C.-Am., JRept. 

 p. 141 (1896). 



Body strongly compressed. Eye large. Eostral nearly as deep 

 as broad, not visible from above ; internasals one third the length 

 of the prsefrontals ; frontal slightly broader than long, as long as its 

 distance from the end of the snout, much shorter than the parietals ; 

 nasal entire ; loreal once and a half as long as deep, bordering the 

 eye ; a prseocular above the loreal ; two postoculars ; temporals 



