154. oxyRHOPUS. 107 
greenish in front, red behind, each scale with a black dot, with- 
black annuli which are narrower on the belly than on the back; 
head uniform orange. 
Total length 870 millim.; tail 165. 
Brazil. 
a. 9 (V. 194; C. 67). Bahia. Dr. O. Nreneee LO: 
b. 2 (V. 203; C. 67). S. America. Liverpool Mus. [E.]. 
8. Oxyrhopus labialis. 
Oxyrhopus labialis, Jan, Elenco, p. 93 (1863), and Icon, Gién. 35, 
ai. fig. 2 (1870). 
— dorbignyi (non D. § B.), Jan, Icon. Gén. 35, pl. iv. fig. 3. 
Eye moderate, its diameter about half the length of the snout, 
which is rounded, scarcely projecting. Rostral broader than deep, 
just visible from above; internasals much shorter than the pre- 
frontals; frontal once and one third to once and a half as long as 
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, extending to the upper surface of the head but not 
reaching the frontal; two postoculars; temporals 2+3; eight 
upper labials, fourth and fifth entering the eye; four (or three) 
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 172-201; anal entire; subcaudals 57-78. Pale brown 
or red above, with or without rhomboidal transverse spots ; head 
dark brown or blackish above; yellow beneath. 
Total length 760 millim. ; tail 130. 
Argentina. 
A. No dorsal spots ; all the scales with a blackish terminal dot. 
a. 6 (V.172; C. 68). Argentina. E. W. White, Esq. [C.]. 
B. A series of large rhomboidal transverse spots on the body and 
tail, the interspaces between them dotted with black. 
a. 2 (V. 201; C. 61). Cosquin, Cordova. E. W. White, Esq. [C. }. 
b. ¥g. (V. 194; C. 64). Salta. Herbert Druce, Esq. [P.]. 
9. Oxyrhopus clathratus. 
Oxyrhopus clathratus, Dum. § Bibr. vii. p. 1026 (1854) ; Gutchen. in: 
Casteln. Anim, Nouv. Amér. Sud, Rept. p. 63, pl. xii.a@ (1855) ; 
Jan, Icon. Gén. 35, pl. iii. figs. 1 & 2 (1870). 
Eye moderate, its diameter about half the length of the snout, 
which is rounded and scarcely 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, a little shorter than the 
parietals ; loreal usually fused with the prefrontal ; one preocular, 
