RARE REPTILES FROM SOUTH AMERICA. 



1063 



brown-olive streak from snout-tip, throngli eye, continuing down 

 neck as the lateral streak ; lips and chin pale 3'ellow-green. 



Type- specimen a half-grown male collected in Trinidad, River 

 Mamore, Bolivia. 



Text-fiirnre 1. 



0.r}/helis boulengeri, sp. 11. 

 Head : a. dorsal view ; h. ventral view ; c. lateral view. 



This charming snake is allied to 0. argenteus Daud., which it 

 resembles in the proportions of the .snout and in the fonith upper 

 labial alone entering the eye-rim. It differs in many characters, 

 however, which are besfa shown by tabulation. 



0. nrgevtpvs. 

 Eye : moflerato, 7 tiniOR in total 

 hotid-longth. 



Frontal : 3 times as long as broad. 



Anal : entire. 



Throat : vv^ith regular punctations. 



Coloration -. upper surface light 

 brown ; ventrals cream, with 2 wide j bright green 

 green lateral and a slender median | streak, 

 streak. '. 



0. boulengeri, sp. n. 

 largo, 5 J times in total licad-longth. 



4 times as long as broad. 



divided. 



immaculate. 



upper surface olive ; ventrals dark 

 Avith pale median 



E L A P I N ^. 



16. Elaps spixit Wagl. 



One female measuring about 3 feet. 



So far as I am aware this rare Ulaps has not previously been 

 recorded from Bolivia. When the British Museum Catalogue 

 was published the collection only contained three small specimens, 

 in wliich the eye was larger in proportion, measuring two-thirds 

 its distance from the mouth. In fully adult specimens the 

 diameter of the eye is only half its distance from the mouth. 



A M n L Y C E r n A I, I D iE. 



17. Leptognatiius catesbyi Sentz. 



69* 



