71. LErTOPHIS. 113 



prsefrontal in confact with labials ; one prreocular, in contact with 

 or narrowly separated from the frontal ; temporals l + 'J; eight or 

 nine upper labials, fourth and fifth or fifth and sixth entering the 

 eye ; five or six lower labials in contact with the anterior chin- 

 shields, which are shorter than the posterior. Scales in 15 rows, 

 all except the outer row more or less distinctly keeled ; the keel 

 on the middle vertebral series more feeble, or obsolete ; scales on 

 neck and tail smooth. Ventrals distinctly angulate laterally, 149- 

 3 01 ; anal divided; subcaudals lOG-163. Green above, head-shields 

 and scales broadly edged with black ; keels black ; ventrals and 

 subcaudals yellowish or pale green, uniform or edged with dark 

 green. 



Total length 1010 millim. ; tail 390. 



Upper Amazons. 



a. 2 (V. 158 ; C. 11-5). Upper Amazons. Mr. E. Bartlett [C.]. 



(Type.) 

 b-c. S (V. 155 ; C. 142) & Pebas. 



2 (V. 161 ; C. 163). 

 d-e. 2 (V. 158, 149 ; C. Peruvian Amazons, 



15.3, 1,50). 

 f-f/. d (V. 1.55; C. 117) Movobamba, N.E. Mr. A. H. Eoff[C.]. 



& 2 (V. 1.53 ; C. 144J. Peru. 

 h. 2 (V. 151 ; C. 106). Sarayacu, N.E. Peru. Mr. W. Davis [C] ; 



Messrs. Veitch [P.]. 



11. Leptophis liocercus. 



Coluber ahstulla, part., Gmel. S. N. i. p. 1116 (1783) ; Bonnat. 



Encifcl. Meth., Ophiol. p. 28 (1789) ; Lacep. Serp. p. 223, pi. xi. 



fig. 1 (1789). 



boiga, part., Baud. Rept. vii. p. 63, pi. Ixxxiv. (1803). 



liocercus, Wied, Ahbild. (1824), aiid Beitr. Nat. Bras. i. p. 265 



(1825). 

 riehardii, Bory de St. Vine. Ann. Sc. Nat. i. 1824, p. 408, 



pi. xxiv. 

 Ahretula liocercus, Gray, Griff. A. K. ix. Hyn. p. 93 (1831). 



riehardi. Gray, I. c. 



Leptophis ahtetulla, part., Bell, Zool. Joxirn. ii. 182.5, p. 328. 

 Dendrophis liocercus, part., Schley. Pltys. Sei'p. ii. p. 224, pi. ix. 



tifi-s. 1 & 2 (1837). 

 Leptophis liocercus, part., Dum. ^ Bibr. vii. p. 533 (1845). 

 Ahajtulla liocercus, part., Giinth. Cat. p. 1.53 (1858). 



liocercus, Giinth. Proc. Zool. Sac. 1859, p. 413. 



Thrasops alistulla. Cope, Proc. Ac. Philad. 1860, p. 557. 



marginatus, Cope, Proc. Ac. Philad. 1862, p. 349. 



Ahffitulla ahsetuUa, Peters, Mon. Bert. Ac. 1873, p. 607. 

 Leptophis liocercus, Jan, Icon. Gen. 49, pi. vi. fig. 1 (1879). 



Rostral broader than deep, just visible from above; internasals as 

 long as or shorter than the prsefrontals ; frontal once and a half to 

 twice as long as broad, as long as its distance from the rostral or 

 the end of the snout, as long as or a little shorter than the parietals ; 

 nasal elongate, entire or divided ; no loreal ; praefrontal in contact 



VOL. II. I 



