106 COLUBRID. 
6. Oxyrhopus doliatus. 
Oxyrhopus doliatus, Dum. § Bibr. vii. p. 1020 (1854). 
—— formosus (non Wied), Giinth. Cat. p. 190 (1858). 
Eye rather small, its diameter two fifths the length of the snout, 
which is rounded and scarcely projecting. 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, a little shorter than the parietals ; 
loreal much longer than deep; one preocular, just reaching the 
upper surface of the head and widely separated from the frontal ; 
two postoculars; temporals 2+3; eight upper labials, fourth and 
fifth entering the eye; four 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 183-199; anal entire; subcaudals 
61-80 pairs. Above with broad black annuli; the anterior much 
wider than the red or reddish-brown interspaces between them ; 
head black above, with a light occipital blotch or a narrow collar ; 
the black annuli may be interrupted on the belly; the red scales. 
tipped with black. 
Total length 550 millim. ; tail 115. 
Brazil. 
A, Annuli complete, broad. 
a. Yg. (V. 199; C. 61). ——: Messrs. Veitch [P.].. 
B, Annuli interrupted on the belly, all except the six or seven 
anterior much narrower than the red interspaces. 
a, b. go (V. 186, 183; C. 77, 80). —? Zoological Society.. 
7. Oxyrhopus formosus. 
Coluber formosus, Wied, N, Acta Ac. Leop. Carol. x. 1820, i. p, 109,. 
Beitr. Nat. Bras. i. p. 881 (1825), and Adbbild. (1825). 
Duberria formosa, Fitzing. N. Class. Rept. p. 56 (1825), 
Lycodon formosus, part., Schleg. Phys. Serp. ii. p. 118 (1887), 
Oxyrhopus formosus, Dum. § Bibr, vii. p. 1022 (1854); Jan, Elenco, 
. 93 (1863). 
? Oxyrhopus leucocephalus, Dum. § Bibr. t. c. p. 1038. 
Eye rather small, its diameter one third to two fifths the length 
of the snout, which is rounded and feebly projecting. Rostral 
broader than deep, just visible from above; internasals much shorter 
than the prefrontals; 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 preocular, just reaching the 
upper surface of the head and widely separated from the frontal ; 
two postoculars; temporals 243; eight upper labials, fourth and 
fifth entering the eye; four lower labials in contact with the anterior 
chin-shields, which are as long as the posterior. Scales in 19 rows. 
Ventrals 182-203; anal entire; subcaudals 51-73 pairs. Body 
