228 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 5S. 



29. ORYZOMYS NITIDUS Thomas. 



Thirteen specimens as follows: 



Machu Picchu, G,000 feet, 4 (Nos. 194549, 194881-2, 194899). 



Eio Cosireni, 3,000 feet, 1 (No. 194829). 



Rio Comberciato, 5 (Nos. 194885-6, 194888-90). 



Rio San Miguel, 4,500 feet, 2 (Nos. 194564-5). 



Santa Ana, 3,500 feet, 1 (No. 194587). 



30. ORYZOMYS STOLZMANNI Thomas. 



Forty -three specimens, as follows: 



Huaracondo, 11,000 feet, 1 (No. 194840). 



Chospyoc, 10,000 feet, 5 (Nos. 194842-5, 194119). 



Torontoy, 8,000-10,000 feet, 3 (Nos. 194842, 194847-8). 



Machu Picchu, 6,000-8,000 feet, 9 (Nos. 194804-5, 194849-50, 

 194861, 194864, 194900-1, 195107). 



Ollantaytambo, 13,000 feet, 3 (Nos. 194806, 194851-2). 



Ocobamba Valley, Tocopoqueyu, 9,100 feet, 1 (No. 194853). 



Paltaybamba, 5,000 feet, 1 (No. 194880). 



Lucnia, 9,000 feet, 2 (Nos. 194865, 194891). 



Rio Cosireni, 3,000 feet, 1 (No. 194884). 



San Fernando, 4,500 feet, 4 (Nos. 194854-5, 194892-3). 



Idma, 6,000 feet, 5 (Nos. 194856, 194858-9, 195105-6). 



Huadquina, 5,000 feet, 1 (No. 194860). 



La Raya Pass, 14,000 feet, 3 (Nos. 194783, 194903-4). 



[Ocobamba and Callanga, Cuzco, 3 (B. M. Nos. 99.10.6.7 and 9, 

 98.11.6.23). O. Garlepp.] 



[Marcapata, Cuzco, 1 (B. M. No. 13.2.3.12). O. Garlepp.] 



31. ORYZOMYS (MICKORYZOMYS) AURILLUS Thomas. 



1917. Oryzomys {Microryzomys) aurillus Thomas, Smiths. Misc. Coll., 

 vol. 68, No. 4, p. 1. April 10, 1917. 



General color about as in 0. minutus, much less strongly buffy than 

 in O. dryas; ears longer than in either. 



Fur soft, close, and woolly, as in other members of the subgenus ; 

 hairs of back about 8 mm. in length. General color above dull dark 

 buffy ("Dresden brown"), rather clearer on sides. Under surface 

 broadly washed with dull buffy ("tawny-olive") ; the bases of the 

 hairs dark slaty for three-fourths their length. Face rather grayer 

 than back. Ears longer than in the other allied species, blackish, 

 contrasting with the general color of the head. Rump generally of 

 the color of the back, but occasionally more strongly fulvous. Hands 

 and feet shining grayish, with more or less prominent dark meta- 

 podial patches. Tail long, finely haired, not penciled, brown, rather 

 paler proximally below. 



