63. HBEPETOBETAS. 75 



E, Pale brown or buff above, turning to blackish on tbe neck ; a 

 bright yellow vertebral stripe on the anterior half of the body, 

 gradually vanishing behind; uniform yellowish white in- 

 feriorly. Temporals 1 + 1 ; usually three labials entering the 

 eye. (IT. flavolineatiis, Jan.) 



a. ? (V. 148; C. 131). Bahia. 



b. Hgr. (V. 159 ; 0. 125). Paraguay. 



c. Hgr. (V. 159 ; C. 147). ? 



3. Herpetodryas fuscus. ^""^ 



Coluber fuscus, Zinn. Mus. Ad. Frid. p. 32, pi. xvii. fig. 1 (1754), 



and S. N. i. p. 383 (1766) ; Daud. Sept. vii. p. 112 (1803). 



saturninus, Zinn. II. cc. p. 32, pi. ix. flg. 1, & p. 384. 



Natrix sourrula, Wagl. in Spiv, Serp. Bras. p. 24, pi. viii. (1824). 

 Hei-petodryas carinatus, part., Schleg. Phys. Serp. ii. p. 175, pi. vii. 



figs. 6-7 (1837) ; Cope, Proc. Ac. Philad. 1860, p. 562. 

 Coluber spixii, Hallow. Proc. Ac. Philad. 1845, p. 241., 



pickeiingii, B,allow. I. c. p. 242. 



Herpetodryas fuscus, part., Dum. Sr Bib: vii. p. 209 (1854) ; Gunih. 



Cat. p. 114 (1858). 

 Dendrophis viridis, JDvm. 8r Bibr. t. c. p. 202,. pi. Ixxix, fig. 1. 

 Herpetodryas sebastus. Cope, I. c. 



PhyUosira flavescens, Cope, Proc. Ac. Philad. 1862, p. 349. 

 Herpetodryas carinatus, vars. glabra, decalepis, sourrula, Jan,Z!lenco, 



p. 80 (1863). 

 holochlorus, Cope, Journ. Ac. Philad. viii. 1876, p. 178. 



Eye large. Eostral broader than deep, just visible from above ; 

 internasals as long as or a little shorter than the prsefrontals ; frontal 

 once and a half to once and two thirds as long as broad, as long as 

 or longer than its distance from the end of the snout, as long as or 

 a little shorter than the parietals ; loreal as long as deep or longer ; 

 one prffi- and two postoculars ; temporals 1 + 1 ; nine upper labials, 

 fourth, fifth, and sixth, rarely fifth and sixth only, entering the eye ; 

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

 are as long as or a little shorter than the posterior. Scales in 10 

 rows, all smooth, or the vertebral pair faintly keeled. Ventrals not 

 angulate laterally, 144-168 ; anal entire ; subcaudals 111-183. 



Total length 2300 milUm. ; tail 760. 



Tropical South America. 



A. Olive-brown above, yellowish or whitish inferiorly. 

 {0. fuscus, L.) 



a. 2 (V. 158 ; 0. 114). Brit. Guiana. Sir E. Schomburgk 



[P.]. 



b, c. (3 (V. 146 ; C. 124) Moyobamba, N.E. Mr. A. H. Eoff [C.]. 

 & 2 (V. 151 ; C. 180). Peru. 



d. cJ (V. 147 ; 0. 122). Cayaria, N.E. Peru. Mr. W. Davis [C.l ; 



Messrs. Veitch [P.]. 



e. c? (V.156; C.P). Guayaquil. Mr. Eraser [C.]. 

 /. Skull. Cayenne. 



g. SkuU. Brazil. 



