506 PROCEEDINGS OF THE ACADEMY OF [Sept., 



Drepanodon erdisii sp. nov. 



Type, Mus. Comp. ZooL, No. 8,829, from Machu Pichu, Peru, 1912; 

 collected by the Yale Peruvian Expedition of that year. 



Head rather distinct from neck; eye moderate, with vertically 

 elliptical pupil. Body quite strongly compressed; scales smooth, 

 no apical pits, in nineteen rows; ventrals 198, rounded; anal un- 

 divided; subcaudals in 64 pairs. Rostral broader than high, just 

 visible from above ; nostril in the suture between two nasals ; frontal 

 longer than broad, almost triangular, the apex being directed back- 

 ward; loreal not conspicuously small, almost a rectangle; one 

 prse- and two postoculars; temporals 2+3; eight upper labials, of 

 which the fourth and fifth enter the eye ; four lower labials in contact 

 with the anterior chin shields, which are al)Out equal in length to the 

 posterior pair. 



In color the head is black, with an incomplete collar interrupted 

 on the nape (red in life undoubtedly and white in spirits). The 

 body is crossed by twenty-seven broad black bands, which are about 

 twelve scales wide dorsally and much more narrow ventrally, usually 

 covering but four ventrals. The result is an equal number of inter- 

 spaces, wide below and narrow dorsally, which are white in spirits 

 (probably also red in life). There are numerous black spots in the 

 white (red?) areas dorsally and a few in the lateral interspaces. 

 Ten black rings upon tail, including the tip, which is black, the 

 interspaces being very narrow. 



Named for Mr. Ellwood C. Erdis, who, with Dr. Eaton, collected 

 these specimens. 

 Drepanodon eatoni Ruthven sp. nov. 



Type. Mus. Comp. ZooL, No. 8,831, from Machu Pichu, Peru, 

 1912; collected by the Yale Peruvian Expedition of that year. 



"There are 12-13 small maxillary teeth subequal or slightly in- 

 creasing in length, followed after a short interspace by two enlarged 

 and compressed teeth. Mandibular teeth subequal. Head distinct 

 from neck; eye moderate with vertically elliptic pupil. Body a 

 little compressed; scales smooth and without pits, in fifteen rows 

 throughout; ventrals 165, rounded. Tail moderate, subcaudals in 

 32 pairs; anal plate entire. Rostral normal, just visible from above; 

 two nasals; frontal slightly broader than long, with an obtuse angle 

 posteriorly; loreal very small and low; preoculars 1 and 2; post- 

 oculars 2; temporals 1-2 and 2-2; upper labials 7, third and fourth 

 beneath the eye; 7 lower labials, four in contact with the anterior 



