APRIL, 1914. MAMMALS OF NORTHERN PERU OSGOOD 145 



and weed patches bordering irrigating ditches north of the city and 

 within two miles. Sea level. 



Pacasmayo, Mch. 2Q~Apr. 4. Small swamps and pastures near a 

 permanent stream east of the town furnished a collecting ground. Else- 

 where there is practically no sign of life. Sea level. 



Cajamarca, Apr. 8-26. The city of Cajamarca is situated on the 

 western edge of a broad, flat valley about 100 square miles in extent. 

 The surrounding mountains are practically treeless and except along 

 small trickling streams, of which there are a few, and about the haci- 

 endas, there is little vegetation. The bottom of the valley, which is 

 crossed by one fair-sized stream, is cultivated and partly irrigated, the 

 crops raised being principally alfalfa, barley, wheat, beans, and potatoes. 

 Collecting was confined to the outskirts of the city and to a rather 

 extensive swamp about three miles north. Altitude 9,200 ft. 



Hacienda Limon, May 4-13. A hacienda about 10 miles west of 

 Balsas owned and managed by Don Pedro ' Mejia y Burga. It is 

 situated on one side of a hanging valley surrounded by mountains and 

 sloping gently toward the Maranon. It is traversed by a shallow stream 

 which leaves the valley through a small gap in the mountains at the 

 lower end whence it drops suddenly and almost precipitously about 

 1,500 ft. to the Maranon River at Balsas. The valley is largely covered 

 with low bushes or thin forest containing occasional trees of fair size. 

 Sugar cane is the principal crop. Altitude 3,000 ft. 



Balsas, May 16. A small village on the Maranon River at the bot- 

 tom of a deep enclosed canyon. The climate here is very hot and 

 although certain types of vegetation are abundant the conditions are 

 relatively arid. Altitude i ,000 ft. 



Tambo Carrizal, May 18. A dilapidated tambo on the side of the 

 mountains directly east of and overlooking Balsas and the Maranon. 

 A tiny spring here is surrounded by a clump of trees, mostly chirimoyas, 

 and the steep slope below has some moderately extensive thickets of 

 low bushes which the moisture from the spring permits to flourish. 

 Elsewhere conditions are arid with occasional bunches of grass, cactuses, 

 or small bushes. Altitude 5,000 ft. =*= 



Mountains east of Balsas, May 19-23. This designation refers to a 

 locality one day's travel beyond Tambo Carrizal at the edge of timber- 

 line and not far below the highest point between Balsas and Leima- 

 bamba. The camp was situated in an upward tongue of forest near 

 the head of a small rushing stream. The place is known locally as 

 Jenes. The mountains below are covered on both sides with relatively 

 dense and heavy forest, the climate being more humid than in the 



