72 On a new Snake from Eastern Peru. 



empty oviducts, found by him at Bitye, Aug. 12, 1909, 

 under the trough or hollow of a plantain-leaf petiole, crouched 

 in the midst of a mass of eggs. It is therefore pretty certain 

 that this species is not viviparous, and that the eggs develop 

 on land without the young passing through a larval stage. 



IX. Description of a new Snake discovered hy Mr. A. E. 



Pratt in Eastern Peru. By G. A. Boulenger, F.R.S. 



(Published by permission of the Trustees of the British Museum.) 



Leptognathus latifasciatus. 



Body strongly compressed. Eye large, its diameter 

 double its distance from the oral border. Rostral a little 

 broader than deep, just visible from above ; internasals half 

 as long as the prefrontals ; frontal slightly broader than 

 lono-, shorter than its distance from the end of the snout, 

 half as long as the parietals ; nasal divided; loreal as long 

 as deep, bordering the eye j a prteocular, separating the 

 prefrontal from the eye; two postoculars; temporals 2 + 3 

 or 1 + 3 ; nine upper labials, fourth, fifth, and sixth entering 

 the eye; first two pairs of lower labials forming a suture 

 behind the symphysial ; three pairs of chin-shields, nearly 

 as long as broad. Scales in 15 rows, vertebrals strongly 

 enlarged, but not broader than long. Ventrals 191 ; anal 

 entire ; subeaudals 106. Anterior part of body with broad 

 blackish-brown annuli separated by cream-coloured inter- 

 spaces two scales in width ; further back the blackish annuli 

 are interrupted on the belly, and towards the posterior part 

 of the body they become narrower and white-edged, separated 

 by broad reddish-brown interspaces; belly closely speckled 

 and spotted with blackish-brown, uniform brown behind ; 

 head dark brown above, with yellowish dots and vermicular 

 lines; upper lip with narrow white vertical bars. 



Total length 430 mm. ; tail 125. 



A single specimen, from the Upper Maranon. 



Closely allied to L. peruana, Boettg., and L. variegata, 



D. &B. 



This is the second species of Leptognathus discovered by 

 Mr. Pratt, a L. pratti, from the Andes of Colombia, having 

 been described by me in these 'Annals ' in 1897. 



