178. OXYBELIS, 191 



Snout rather more than twice as long as the eye. Rostral much 

 broader than deep, scarcely visible from ahove ; internasals as long 

 as or a little shorter than the preefrontals ; frontal twice to twice 

 and a half as long as broad, not broader than the supraocular, as 

 long as or shorter than its distance from the end of the snout or the 

 parietals ; loreal elongate, often fused with the prsefrontal ; one 

 prsBocular, widely separated from the frontal ; two postoculars ; 

 temporals 1 + 2 ; six upper labials, fourth entering the eye ; four 

 lower labials in contact with the anterior chin-shields, which are 

 much shorter than the posterior. Scales smooth, in 17 rows. 

 Ventrals 189-207 ; anal entire ; subcaudals 150-188. Pale 

 greyish brown or purplish above, with three darker longitudinal 

 streaks, the outer of which extend to the end of the snout, passing 

 through the eyes ; upper lip whitish ; throat bluish grey, dotted 

 with black ; yellowish beneath, with two olive-green stripes and a 

 narrow median line of the same colour. 



Total length 1060 millim. ; tail 410. 



Guianas, Brazil, Eastern Peru. 



a. 5 (V. 198; 0. 166). Cayenne. 



b. tj (V. 206; 0.150). Pebas, Upper Amazons. H. W. Bates, Esq. 



[P.]. 



c. t? (V. 204; 0; 185). Yurimaguas, N.E. Peru. 



3. Oxybelis fulgidns. 



Natrix flagelliformis, part., Zaur. Syn. Sept. p. 79 (1768). 

 Coluber fulgidus, Baud. Kept. vi. p. 852, pi. Ixxx. (1803). 

 Dryophis fulgidus, Fitzing. N. Class. Rept. p. 60 (1826) ; Soie, Ids, 



1827, p. 646; Wagl. Icon. Amph. pi. x. (1829); Giinth. Cat. p. 158 



(1858) ; Cope, Proc. Ac. Philad. 1860, p. 555 ; Gimth. Biol. C.-Am , 



JJepi. p. 178 (1895). 

 DryiopHs catesbyi, ScMeg. Phys. Serp. ii. p. 252, pi. x. figs. 6-8 



(1837), and Ahbild. p. 114, pL xxxvi. (1844). 

 Oxybelis fulgidus, part., Bum. Sf Bibr, vii. p. 817 (1854). 



flagelliformis, Steind. Novara, Pept. p. 73 (1867). 



fulgidus, Jan, Icon. Oen. 33, pi. iv. fig. 1 (1869). 



Snout about thrice aa long as the eye, flat at the end and very 

 prominent. Eostral a little broader than deep, scarcely visible 

 from above ; internasals shorter than the prsefrontals ; frontal once 

 and a half to twice as long as broad, not broader than the supra- 

 ocular, as long as or a little longer than the prsefrontals, as long as 

 or a little shorter than the parietals ; no loreal, praefrontal in 

 contact with two or three labials ; one prseoeular, narrowly sepa- 

 rated from the frontal ; two postoculars (rarely one) ; temporals 

 very large, l-f-2; nine or ten upper labials, fourth, fifth, and sixth 

 or fifth, sixth, and seventh entering the eye ; four lower labials in 

 contact with the anterior chin-shields, which are much shorter than 

 the posterior. Scales in 17 rows, dorsals feebly keeled. Ventrals 

 198-217; anal divided; subcaudals 139-165. Bright green above 



