i yo FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. X. 



traps and only secured them by shooting them when they came out and 

 ran about in the candlelight during the evenings. After exhausting the 

 possibilities of his own hut, he tried various others but had no further 

 success. 



Cavia atahualpa? Osgood. MOUNTAIN CAVY. 



Four specimens, Cajamarca. 



Cavies were obtained only at one locality, a swamp on the out- 

 skirts of Cajamarca. Although they seemed fairly common in this 

 place, it was difficult to obtain perfect specimens. Most of the area 

 was covered with from one to two feet of water and thickly grown with 

 tall rushes. Near the edges were stretches of soft spongy turf and pools 

 of shallow water covered with floating or partially anchored vegetation. 

 Here the runways of the cavies were found threading the rushes and 

 passing from one relatively dry place to another. A few traps were 

 placed in these runways but seemed to be avoided and no specimens 

 could be secured in this way. But although apparently so shy of traps, 

 the cavies exposed themselves to view with considerable unconcern 

 during a short period just before nightfull, so it was sometimes possible 

 to shoot them. The principal difficulty was to sight one in the thick 

 rushes before it was so near that a charge of shot would ruin it as a 

 specimen. 



Signs of cavies were noted also in a grassy swamp near Tambo 

 Ventija east of Molinopampa. All efforts to obtain specimens there 

 were unsuccessful and it was concluded the colony had recently been 

 deserted. 



Viscaccia sp. VISCACHA. 



Viscachas undoubtedly inhabit many of the higher parts of the 

 mountains we traversed but the region is near the northern limit of their 

 distribution and they are everywhere scarce and difficult to obtain. A 

 few burrows at least lately occupied were found along the highest ridges 

 above Otuzco and Hacienda Llagueda, but traps placed about them 

 remained unsprung. They are said to occur in the mountains sur- 

 rounding Cajamarca and even in the rocky cliffs along the river in the 

 hot Maranon Valley. West of the Maranon, no reliable reports of 

 their occurrence were obtained. 



Sylvilagus capsalis Thomas. 



Two halfgrown young, Hacienda Llagueda. 



These may be tentatively referred to S. capsalis although they are 



