10 PROCEEDINGS OF THE ACADEMY OF [Jan., 



the Rio Machangara, Ecuador, February, 1895. One of the speci- 

 mens before me was obtained March 16, 1904, but neither has 

 .ttn exact locality. 



2. Epimys rattus (Linn). 



Mus rattus Linnaeus, Syst. Nat., ed. 10, vol. 1, p. 61, 1758. (Sweden.) 



One skin and three skulls in the collection, obtained at Hacienda 

 Jalancay, Chunchi, Chimbo, and at Bucay, Guayas. 



3. Epimys norvegicus (Erxleben). 



Mus norvegicus Erxleben, Syst. Regni Anim., vol. 1, p. 381, 1777. (Norway.) 



One skull, from specimen caught in a house at Bucay, June 15, 1911. 



4. Mus musculus (Linn). 



Mus musculus Linnaeus, Syst. Nat., ed. 10, vol. 1, p. 62, 1758. (Sweden.) 



Five specimens obtained at Riobamba and Hacienda Garzon at 

 the southern foot of Mt. Pichincha, 11,000 feet. 



5. Oryzomys minutus (Tomes). 



Hesperumys minutus Tomes, Proc. Zool. Soc. London, 1860, p. 215. 

 (Ecuador.) 



The Hesperomys minutus of Tomes was based upon an immature 

 specimen obtained by Fraser, but without definite locality, although it 

 was supposed to be from Pallatanga. Oldfield Thomas, in describing 

 a new species of this genus from Peru (Aim. and Mag. Nat. Hist., 

 1894 (XIV), p. 357), identified with Tomes' type an adult specimen 

 in the British Museum which was also collected by Fraser at Palla- 

 tanga, Decemljer, 1858. Later (op. cit., 1898 (II), p. 267) he de- 

 scribed this specimen as new under the name Oryzomys dryas. His 

 explanation of this action is that specimens received from Mr. 

 Soderstrom (locality not given) were obviously identical with Tomes' 

 type and different from the Pallatanga skin. 



Mr. Rhoads' five specimens were all obtained in the vicinity of 



Hacienda Garzon (or Rosario) at the southern foot of Mt. Pichincha, 



some of them "in meadows and swamps below the house, 10,150 feet, " 



others higher up near the paramo, 12,000 feet. 



Hind 

 Length. Tail. foot. Ear. 



d^. May 12, 1911 180 100 23 11.5 



cf , May 12, 1911 183 103 23 12 



d", May 13, 1911 178 98 23 13 



d", May 15, 1911 180 100 23 13 



9, May 12, 1911 190 103 22 12 



The Soderstrom specimens mentioned by Thomas doubtless 'came 

 from Pichincha, which is of easy access from Quito, and probably , 



