114 Mr. G. A. Boulenger on 



widening behind, the upper passing above, the lower below 

 tl e ear-opening ; a black longitudinal streak on each side of 

 the throat. 



S- 2- 



mm. mm. 



Total length 505 520 



Head 31 33 



Width of head 18 20 



Body 104 117 



Fore limb 54 62 



Hind limb 70 78 



Tail 370 370 



Three specimens (male, female, and young) from the 

 Province Sara, Eastern Bolivia, altitude 750 metres, collected 

 by Mr. J. Steinbach, and two (females) from Cliancamayo, 

 Eastern Peru, collected by Mr. C. Schunke. Tlie female 

 from Bolivia laid ten white eggs with parciiment-like shell, 

 regularly elliptical in shape ; longitudinal diameter 29 mm., 

 transverse diameter 14. 



Polychrus acutirostris, Spix, is also represented in 

 Mr. Steinbach's collection from the Province Sara. 



Lioph's opisthotcenia. 



Eye moderately large ; snout short. Rostral broader than 

 deep, visible from above, internasals broader than long, shorter 

 than the prefrontals ; frontal once and two thirds as long as 

 broad, longer than its distance from the end of the snout, a 

 little shorter than the parietals ; loreal deeper than long; one 

 prajocular (exceptionally divided) and two postoculars ; 

 temporals 1+2; seven upper labials, third and fourth 

 entering the eye ; four lower labials in contact with the 

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

 posterior. Scales in 17 rows. Ventrals 149-151 ; anal 

 divided ; subcaudals 64-66. Olive above, bluish grey on 

 the sides, with or without black and light spots ; a black, 

 light-edged lateral streak along the posterior part of the 

 body and the tail; upper lip white, edged with a blackish 

 line above, which may expand into a nuchal spot ; lower 

 parts white. 



Total length 395 mm. ; tail 95. 



Two specimens from Merida, Venezuela, 1600 m.^ from 

 Sr- Briceno's collection. 



Atr actus melas. 



Snout pointed. Rostral small, a little broader than deep, 

 ]ust visible from above ; internasals small, as long as broad ; 

 preefrontals longer than broad ; frontal as long as broad, as 



