SnaJces tn the British ^ftlseu^n. 455 



Total length 540 mm. ; tail 150. 



Two specimens, female and young, from the Province 

 Sara, Department Santa Cruz de la Sierra, collected by 

 Hr. J. Steinbach. 



Li'ophis oltgolepis. 



Eye large. Rostral broader than deep, visible from above; 

 internasals a little broader than long, shorter than the prge- 

 frontals ; frontal twice as long as broad, mucli longer than its 

 distance from the end of the snout, a little shorter than the 

 parietals; loreal deeper than long; one pra3- and two post- 

 oculars; temporals 1 + 2; eight upjier labials, fourth and 

 fifth entering the eye ; four lower labials in contact with the 

 anterior chin-shields, which are a little longer than the 

 posterior. Scales in 15 rows. Ventrals 152 ; anal divided ; 

 subcaudals 61. Olive-brown above, tlie scales dark-edged ; 

 upper lip and lower parts white ; a black streak behind the 

 eye, above the posterior upper labials j a black streak along 

 each side of the tail. 



Total length 320 mm. ; tail 73. 



A single female specimen from Igap^-Assu, Para, Brazil, 

 collected by M. A. Robert. 



Atractus ventrimacuJatus. 



Snout obtuse. Rostral small, nearly as deep as broad, 

 just visible from above; internasals very small ; prefrontals 

 as long as broad ; frontal as broad as long or a little longer 

 than broad, as long as its distance from the end of the snout, 

 mucli shorter than the parietals ; loreal twice to twice and a 

 half as long as deep ; two postoculars ; temporals 1 + 2 ; 

 eight upper labials (exceptionally seven), fourth and fifth (or 

 third and fourth) entering the eye ; four lower labials in 

 contact with the single pair of chin-shields, which are mode- 

 rately large and separated from the symphysial. Scales in 

 15 rows. Ventrals 145-157 in males, 158-159 in females; 

 anal entire ; subcaudals 19-20 in males, 14-15 in females. 

 Olive to blackish brown above, uniform or with dark and 

 light spots ; a black vertebral stripe sometimes present ; 

 lower parts whitish, much speckled and spotted with black. 



Total length 430 mm. ; tail 30. 



Several specimens from Merida (1630 m.) and Fuqueros 

 (2500 m.), Venezuela, collected by Sefior Briceno. 



