)iew Reptiles from the Andes. 42:5 



Scales in 19 rows, vertebrals not enlarged. Ventrals 199 ; 

 anal entire ; subcaudals 94. Black, with narrow, wliitish, 

 black-spotted cross-bars above, widening or bifurcating on 

 the sides ; a few whitish spots on the upper lip, behind the 

 ej'e ; belly lineolate with white. 



Total length 950 ; tail 240 mm. 



A siuule female specimen from Huancabamba, E. Peru, 

 above 3000 feet, from the collection of Mr. E. Boettger. 



Allied to L. altemans, Fisch. Distinguished from all the 

 species of the genus by the number of rows of scales. 



Lachesis pleuroxanthus. 



Head short, cordiform ; snout turned up at the end, with 

 sharp canthus. Kostral a little deeper than broad ; nasal 

 divided ; upper head-scales small, feebly imbricate, smooth 

 on snout and vertex, feebly keeled on occiput, larger and 

 more decidedly keeled on temples; supraocular large, sepa- 

 rated from its fellow by 8 series of scales; internasals sepa- 

 rated by a pair of apicals ; two or three series of scales 

 between the eye and the third and fourth upper labials ; loreal 

 pit separated from the upper labials; latter 7. Scales rather 

 feebly keeled, in 23 rows. Ventrals 144; anal entire ; sub- 

 caudals 49 pairs. Tail not prehensile. Greyish above, 

 bright yellow on the sides, which bear A-shaped dark grey 

 markings, some of which meet on the back, each bianch 

 terminating in a black spot ; a dark streak, light-edged above, 

 from the eye to the angle of the mouth ; sides and lower 

 surface of head bright yellow, without spots ; belly closely 

 mottled with blackish, with a series of large black spots on 

 each side. 



Total length 350 ; tail 55 mm. 



A single female specimen from Alpayacn, Rio Pastaza, 

 E. Ecuador, 3600 feet, from the collection of Mr. M. G. 

 Palmer. 



Closely allied to L. niicrophihahnus^ Cope. Distinguished 

 by the larger eye, the shorter body, and the feebly keeled 

 scales. 



Lachesis chloromelas. 

 Snout rounded, with sharp canthus. Rostral as deep as 

 broad ; nasal divided ; upper head-scales keeled ; a large 

 supraocular ; 5 or 6 longitudinal series of scales between the 

 supraoculars ; small frontal and parietal shields sometimes 

 present ; two series of scales between the eye and the third 

 and fourth upper labials j temporal scales strongly keeled ; 



