104 OOLTJBEID^. 



c, d, e-ff, h-m. d (V. 187 ; Eio Grande do Sul. Dr. H. v. Ihering 



0. 67), 2 (V. 201, 203, [0.]. 



200,195; C. 60, 69, 56, 



65), & jg. (V. 186, 193, 



202,196,204; C. 71, 63, 



56, 60, 51). 

 n. Hgr. (V. 180 ; C. 47). Paraguay. Prof. Grant [P.]. 



0. Yg. (V. 199 ; 0. 80). Asuncion, Paraguay. Dr. J. Bohls [0.]. 

 p. Yg. (V. 174; 0. 69). Uruguay. 

 g-. 2 (V. 225 ; 0. 70). Charocampa, Bolivia. 



3. Oxyrhopus trigeminus. 



Lycodon formosus, part., Schleg. Phys. Serp. ii. p. 113 (1837). 

 Oxyrhopus trigeminus, Dum. 8f Bibr. vii. p. 1013 (1854) ; Giinth. 



Cat. p. 191 (1858). 

 tergeminus, part., Jan, Icon. Gin, 36, pi. i. fig. 4 (1870). 



Eye moderate or rather small, its diameter two fifths to one half 

 the length of the snout, which is obtuse but rather prominent. 

 Eostral broader than deep, just visible from above ; internasals 

 much shorter than the praefrontals ; frontal a little longer than 

 broad, as long as its distance from the end of the snout, shorter 

 than the parietals ; loreal at least twice as long as deep ; one prse- 

 ocular, forming a narrow suture with the frontal ; two postooulars ; 

 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 174^203 ; anal entire ; subcaudaJs 

 55-83 pairs. Eed above, some or all of the scales tipped with 

 black, with more or less regular black cross-bars disposed in threes ; 

 head yeUow or red above with a black blotch on the crown, some- 

 times extending on the snout ; yellow beneath. 



Total length 660 millim. ; tail 115. 



Guianas, Brazil. 



a-b. (J (V. 179 ; 0. 70) & P Demerara. Capt. Sabine fP.! 

 (V. 195 ; C. 56). 



c. 5 (V. 198 ; 0. 64). Pemambuco. W. A. Forbes, Esq. [P.]. 



d. d (V. 181 ; 0. 73). Pemambuco. H. N. Ridley, Esq. [P.I. 

 e-f. $ (V. 193 ; C. 57) & hgr. Bahia. Mr. Ker [P.]. 



(V. 185 ; 0. 57). 

 g-h. ? (V. 190,188; C. P,?). Bahia. Dr. O. Wucherer [OJ. 



i. 2 (V. 174; 0. 67). Kio Janeiro. D. WUson Barker, Esq. 



[P.]. 

 h-l c? (V. 181 ; C. 75) & 5 S. America. W. F. Evans, Esq. fP.]. 



(V. 193 ; 0. 62). 



4. Oxyrhopus Mtorquatus. (Piate VI. fig. 1.) 



Oxyrhopus trigeminus, var., Peters, Mon. Berl. Ac. 1871, p. 401. 

 ? Oxyrhopus submarginatus, Peters, I. c. 



Tachymenis bitorquatus> Oiinth. Ann. Sr Mag. N. H. (4) ix. 1872, 

 p. 19. 



Eye moderate, its diameter about half the length of the snout; 



