154. OXYEHOPUS. 105 



snout rounded, scarcely projecting. Eostral broader than deep, just 

 visible from above ; internasals much shorter than the praefrontals ; 

 frontal slightly longer than broad, as long as its distance from the 

 end of the snout, a little shorter than the parietals ; loreal much 

 longer than deep ; one prseooular, usually forming a narrow suture 

 with the frontal; two postoculars ; temporals 2+3; eight upper 

 labials, fourth and fifth entering the eye ; four or five lower labials 

 in contact with the anterior chin-shields, which are as long as or a 

 little longer than the posterior. Scales in 19 rows. Ventrals 

 185-206; anal entire; subcaudals 76-89 pairs. Eed above, the 

 scales tipped and edged with black ; head black above, usually with 

 .a light cross-band behind the parietals and one or two black cross- 

 bands on the nape ; the snout sometimes yellow ; black cross-bands 

 disposed in threes may be present on the body ; lower parts yellow. 



Total length 890 millim. ; taU 175. 



Upper Amazon, Bolivia. 



M. Yg. (V. 197 ; C. 85). Peruvian Amazon. Mr. E. Bartlett [0.]. 



b. 6 CV. 206 ; 0. 76). Upper Amazon. Mr. E. Bartlett [0.1. 



.c-<i. c? (V. 187, 185; Moyobamba, Peru. Mr. A. H. Eoff [0.1. 



C. 81, 82). -' 



^. cJ (V. 191; C.?). Pozuzu, Peru. Mr. W. Davis [C.]; 



Messrs "Veitcli fP T 



/; 9- S (V. 196, 185; Sarayacu, Peru., Mr. W." Davis rc'l; 



0. 89, 83). Messrs. Veitch [T.T. 



h-i. S (V. 194, 197 ; R. Ucayali. Dr. E. A. Goldi \S.\ 



C.87,86). ^ 



k. Yg. (V. 206; C. 76). Yungas, Bolivia. 



5. Oxyrhopus melanogenys. 



Sphenocephalus melanogenys, Ts6kud\ Faun. Per., Herp. p. 49, 



pi. iv. (1846). 

 Oxyrhopus tergeminus, part., Jan, Icon. 64n. 36, pi. i. fig. 3 (1870). 



Eye small, its diameter not more than one third the length of the 

 «Qout; snout rounded, scarcely projecting. Eostral broader than 

 ■deep, just visible from above; internasals shorter than the prae- 

 ^ontals ; frontal slightly longer than broad, as long as its distance 

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

 longer than deep ; one prseocular, reaching the upper surface of the 

 lead but separated from the frontal ; two postoculars ; temporals 

 2-1-3; eight upper labials, fourth and fifth entering the eye; five 

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

 long as the posterior. Scales in 19 rows. Ventrals 206 ; anal 

 •entire; subcaudals 79 pairs. Eed or pale reddish brown above, dotted 

 "with blackish brown ; head blackish brown above ; nape blackish 

 brown or with a pair of black cross-bands ; anterior half of body with 

 a few black cross-bands disposed in threes ; belly yellowish. 

 . Total length 680 miUim. ; tail 170. 



Chanchamayo, Peru. 



