d04 Mr. G. A. Boulenger on new Snakes. 
and behind the eye and another on each side of the nape ; 
lower parts yellowish white; end of tail black. 
Total length 385 millim.; tail 48. 
A single male specimen from Brazil, from the collection 
of the late Mr. J. Pym. 
Miodon Christy?. 
Diameter of eye three fifths its distance from the oral 
margin. Rostral broader than deep, just visible from above ; 
internasals a little shorter than the prefrontals; frontal 
considerably broader than the supraocular, a little longer 
than broad, as long as its distance from the rostral, much 
shorter than the parietals; nasal entire, in contact with the 
preeocular; two postoculars; temporals 1+1,; seven upper 
labials, third and fourth entering the eye; first lower labial 
forming a suture with its fellow behind the symphysial; four 
lower labials in contact with the anterior chin-shields, which 
are larger than the posterior. Scales in 15 rows. Ventrals 
209; anal divided; subcaudals 20. Black above and on 
the lower surface of the head ; ventrals and subcaudals white, 
_broadly margined with black. 
Total length 430 millim.; tail 28. 
A single female specimen from Uganda. Presented by 
Dr. C. Christy. . 
Lachesis peruvianus. 
Snout obtusely acuminate, with sharp, somewhat raised 
canthus. Rostral a little deeper than broad; nasal divided ; 
upper head-scales keeled; a large supraocular; 7 longi- 
tudinal series of scales between the supracculars ; a narrow 
subocular shield between the eye and the fourth labial; tem- 
poral scales strongly keeled; 7 or 8 upper labials, second 
forming the anterior border of the loreal pit. Scales strongly 
keeled, in 23 rows. Ventrals 188; anal entire; subcaudals 
66, all except a few of the anterior in pairs. ‘Tail prehensile. 
Green, anteriorly with black and yellowish spots, further 
back with angular yellowish-white cross-bands which are 
edged with black alternately in front or behind; a series of 
large yellowish spots on each side, above the ventrals; a 
f#* -shaped blackish marking on the head, and two others, 
¢2-shaped, on the occiput; a broad black band on each side 
from the eye to the angle of the mouth; belly yellowish, 
spotted with pale green; a yellowish, black-edged streak 
along each side of the tail. 
Total length 555 millim. ; tail 80. 
A single female specimen from La Oroya, Carabaya, 
S.E. Peru, collected by Mr. Ockenden. 
