1913.1 NATURAL SCIENCES OF PHILADELPHIA. 505 



REPTILES COLLECTED BY THE YALE PERUVIAN EXPEDITION OF 1912. 

 BY THOMAS BARBOUR. 



Dr. Hiram Bingham has sent me two small lots of snakes, nine 

 specimens in all, from Machu Pichu, 9,000-10,000 feet altitude, 

 Department of Cuzco, Southern Peru. They were collected by 

 Dr. George P. Eaton and Mr. EUwood C. Erdis. Four species are 

 represented, of which two are new. The types of the new species 

 have been studied by Dr. A. G. Ruthven, and the description of one 

 of them appears under his name. The other he returned, since he 

 had no material of the genus Drepanodon for direct comparison, and 

 since the Yale specimen had its teeth badly broken he was loath to 

 describe it. I have, however, a specimen of D. anomalus Jan., 

 which I obtained in Bolivia, and am enabled to make quite sure, 

 I think, that the second specimen represents an undescribed species 

 of this genus. The fact that Dr. Ruthven was leaving for South 

 America on a collecting trip, and the desirability of reporting on this 

 material at once, has led me to describe one species myself with 

 Dr. Ruthven's consent, and to include his description of the other 

 with my own. Dr. Bingham has kindly added these specimens to 

 the Reptile Collection of the Museum of Comparative Zoology. 



Atractus badius (Boie). 



Boie, Isis, 1S27, p. 540. 



Boulenger, Cat. Sn. B. M., 2, 1894, p. 308. 



Four specimens from Machu Pichu. In squamation these all fall 

 within the limits indicated by Boulenger (I.e.). In coloration, 

 however, they do not agree quite so well. It is also noteworthy that 

 these four examples from the same locality are exactly alike in 

 pattern and shade of color. They are pale reddish-brown above, 

 with more or less irregular darker blotches above which have a 

 tendency to fall into alternating series upon the dorsal region. The 

 ventral surface is covered with blotches of brownish-black, many 

 of which are often confluent. This coloration combines some of the 

 characters described by Boulenger for what he calls var. B. and C. 

 Nevertheless, it is quite different and may be confined to specimens 

 from this part of Peru. If this turns out to be the case, it will be 

 advisable to name this race. 

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