178. oxYBELIs, 191 
Snout rather more than twice as long as the eye. Rostral much 
broader than deep, scarcely visible from above; internasals as long 
as or a little shorter than the prefrontals; 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 prefrontal; one 
-preocular, 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. 9 (V. 198; C. 156), Cayenne. 
6. & (V. 206; C. 150). Pebas, UpperAmazons. H. W. Bates, Esq. 
1 aie 
@. 3 (V. 204; C: 185). Yurimaguas, N.E. Peru. 
3. Oxybelis fulgidus. 
Natrix flagelliformis, part., Zawr. Syn. Rept. p. 79 (1768). 
Coluber fulgidus, Daud. Rept. vi. p. 352, pl. Ixxx. (1803). 
Dryophis fulgidus, Fitzing. N. Class. Rept. p. 60 (1826); Bote, Isis, 
1827, p. 546; Wagl. Icon. Amph. pl. x. (1829); Giinth. Cat. p. 158 
(1858) ; Cope, Proc. Ac. Philad. 1860, p. 555 ; Giinth. Biol. C-Am., 
Rept. p. 178 (1895). 
Dryiophis catesbyi, Schleg. Phys. Serp. ii. p. 252, pl. x. figs. 6-8 
(1837), and Abbild, p. 114, pl. xxxvi. (1844). 
Oxy belis ah fea part., Dum. & Bibr. vii. p. 817 (1854). 
—— flagelliformis, Steind. Novara, Rept. p. 78 (1867). 
—— fulgidus, Jan, Icon. Gén. 33, pl. iv. fig. 1 (1869). 
Snout about thrice as long as the eye, flat at the end and very 
‘prominent. Rostral a little broader than deep, scarcely visible 
from above ; internasals shorter than the prefrontals ; 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 preefrontals, as long as 
or a little shorter than the parietals; no loreal, prefrontal in 
contact with two or three labials; one prexocular, narrowly sepa- 
rated from the frontal; two postoculars (rarely one); temporals 
very large, 1+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, 
