226 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 58. 



23. TREMARCTOS ORNATUS F. Cuvier. 



Female, No. 194309, Machii Picchii. 



The skull of this bear corresponds closely with those from Cos- 

 nipata, Inambari, which I used for comparison in giving a name to 

 the Ecuador T. o. niajori. It is 191 mm. in condA^lobasal length by 

 128 mm. in zygomatic breadth. The two upper molars together 

 measure 37 mm. 



The skin presents a good example of the uselessness of the " spec- 

 tacles " as a distinctive character, for it has a light supraorbital line- 

 on one side and not on the other. 



24. SCIURUS CASTUS Thomas. 



Female, No. 194486, Rio Comberciato (2,000 feet). 



25. SCIURUS CUSCINUS Thomas. 



Female, No. 194487, Rio Comberciato (2,000 feet). 



Two females from San Fernando, Rio San Miguel, 4,000 feet 

 (Nos. 194488-9). 



[Two, Nos. 98.11.6.8-9., B. M. (No. 8 the type), from Ocobamba. 

 O. Garlepp.] 



[Three, Nos. 3.2.9.3-5., from Marcapata. O. Garlepp.] 



26. MUS MUSCULUS Linnaeus. 



Eleven specimens, as follows : 

 Huaracondo, Cuzco, 2 (Nos. 194502-194765). 

 Chospyoc, 10,000 feet, 2 (Nos. 194503, 194905). 

 Ollantaytambo, 9,400 feet, 5 (Nos. 194504-5, 194508-10). 

 Idma, 6,000 feet, 2 (Nos. 194513-4). 



HOLOCHILUS INCARUM. new species. 



A medium-sized species related to H. sciureus^ but less buffy on 

 flanks. 



Size apparently about as in H. sciureus, but no adult female avail- 

 able for examination. General color above umber brown, not 

 markedly more buffy on the flanks. Under surface slaty, washed 

 with buffy, the hairs on a small patch on the throat white to their 

 roots, but everywhere else broadly slaty at base, cinnamon buff termi- 

 nally. Ears small, hairy, not darker than the general color of the 

 head. Upper surface of hands and feet, buffy whitish. Tail about 

 the length of the head and body, thinly haired, brown, rather lighter 

 at base below. 



Skull (pi. 14, fig.' 1) not heavily ridged, but the only skull avail- 

 able is immature. Teeth comparatively small, as is usual in the 

 Amazonian forms of Holochilus. 



Dimensions of type, measured in the flesh by Mr. Erdis : 



