NO. 2352. AMPHIBIANS AND REPTILES— BARBOUR AND NOBLE. 619 



31. DREPANODON ATTENUATUS, new speciea. 



Diagnostic characters. — Scales smooth, in 19 rows ; no apical pits ; 

 ventrals 229, rounded ; siibcaudals in 105 pairs ; loreal smaller than 

 the preociilar, but nearly as large as the posterior nasal. 



Range. — Cosireni Kiver Valley, Peru. 



Tyjie-specimen.—C^t. No. 60739, U.S.N.M. ; from the alimentary 

 tract of a specimen of Erythrolamyrus aesculapii, taken near Rio 

 Cosireni, Peru, August, 1915 ; E. Heller, collector. 



Description of type specimen. — About 10 small maxillary teeth, 

 subequal (the jaws were somewhat smashed), followed after a short 

 interspace by two somewhat enlarged and distinctly grooved teeth; 

 head scaixely distinct from the neck; eye moderate with vertically 

 eliptical pupil ; body slightly compressed ; scales smooth, in 19 rows ; 

 no apical pits; ventrals 229, rounded; anal undivided; subcaudals in 

 105 pairs; rostral broader than high, just visible from above; nos- 

 tril in the suture between two nasals; frontal longer than broad; 

 loreal smaller than the preocular, but nearly as large as the poste- 

 rior nasal; loreal elongate, forming a rectangle; one preocular and 

 two postoculars ; temporals 2-4-3 ; seven and eight upper labials, of 

 which the third and fourth on one side, and the third, fourth, and 

 fifth on the other enter the eye ; four lower labials in contact with the 

 anterior chin-shields, which are about equal in length to the posterior 

 pair. Color (in alcohol) of the head, above and on the sides, black, 

 each scale edged with white, and pinkish below ; ground color of the 

 body pinkish; 64 black annuli encircling the body, of very irregu- 

 lar outline, the scales forming the edges being generally entirely 

 black ; scattered black spots present on the tips of some of the scales 

 of the pink interspace ; these light rings generally wider below than 

 above; more black on the sides of the body than above; 16 of the 

 black bands encircling the tail, tip black. 



Remarks. — This species is represented by a single specimen. The 

 occurrence of still another species of Drepanodon'^ in the Uru- 

 bamba Region would lead us to suppose that these night-prowling 

 snakes are much more numerous than generally recorded. 



32. MICRURUS HETEROZONUS (Peters). 



A single specimen (U.S.N.M. No. 60701) of this rare species - 

 from Cosireni, 4,000 feet altitude, September 10, 1915; Heller col- 

 lector. 



1 Barbour, Proc. Acad. Nat. Sci. Philadelphia, 1913, pp. 505-507, pi. 17. 



" For use of Micrurus instead of Elaps see Stejneger and Barbour, Check List N. 

 Amer. Amph. Rept, 1917, p. 106. 



