COLUBRID, 
Rio Grande do Sul. 
Dr. H. v. Ihering 
* 903, [C.]. 
. 180; 0.47). Paraguay. 
99 ; ) Asuncion, Paraguay. 
Uruguay. 
Charocampa, Bolivia. 
Prof. Grant [P.]. 
Dr. J. Bohls [C.]. 
3. Oxyrhopus a 
Lycodon formosus, part., sri Ph 
Phys. Serp. ii. p. 118 (1887). 
Oxyrhopus trigeminus, Dum. . Vii. Hy {013 (1854) ; Giinth. 
Cat. p. 191 (1858). 
—— tergeminus, part., Jan, Icon. Gén, 36, pl. 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. 
Rostral broader than deep, just visible from above ; internasals 
much shorter than the prefrontals; 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 pra- 
ocular, 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 174-203; anal entire ; subcaudals 
55-83 pairs. Red above, some or all of the scales tipped with 
black, with more or less regular black cross-bars disposed in threes ; 
head yellow 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. g (V.179; C. 70) & Q Demerara, Capt. Sabine [P.]. 
(V. 195; ©. 56). 
. 2 (V. 198 ; ©, 64). Pernambuco, W. A. Forbes, Trad 
Z. da (V. 181; ©. 73). Pernambuco. .H. N, oie 
Ty 1 ha 1985 ayn 57) & hgr. Bahia. Mr, K 
rhe Ww 100, er ls P,P). Bahia. Dr. O. Wucherer [C. ], 
V. 174; Rio Janeiro, OD, Pa Barker, Esq, 
k-l. g V. 181; C. Hh & 9 8S, America. W. F. Evans . [P.]. 
ro 180; Gay ) Esq. [P.] 
4, Oxyrhopus bitorquatus. (Pare VI. fig. 1.) 
Oxyrhopus trigeminus, var., Peters, Mon. Berl. Ac. 1871, p. 401. 
? Oxyrhopus submarginatus, Peters, l. ¢. 
Gir at bitorquatus, Giinth. Ann. § Mag. N. H. (4) ix. 1872, 
Eye moderate, its diameter about half the length of the snout; 
