146 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. X. 



region to the westward. Above this forest was open grassy "jalca." 

 Altitude 10,000 ft. 



Rio Utcubamba, May 26, 30. Small collections were made May 26 

 in a swampy mountain glade near the source of a western branch of the 

 Utcubamba about six miles west of Leimabamba. Altitude 8,000 ft. 



Later, on May 30 a stop was made on the bank of the river about 

 15 miles above Chachapoyas. Altitude 7,500 ft. 



Chachapoyas , June 2-6. Chachapoyas is situated on an open, prac- 

 tically treeless plateau and although some of the neighboring canyons 

 in the mountains are well wooded and apparently well watered, the 

 immediate vicinity of the city is dry and unfavorable for much animal 

 life. Altitude 7,700 ft. 



Tambo Ventilla (or Ventijd), June 13-19. A much frequented tambo 

 in a mountain valley just below timberline near the source of the 

 Huancachaca River which joins the Utcubamba below Chachapoyas. 

 It is about 10 miles east of Molinopampa and perhaps 20 from Chacha- 

 poyas. The region is one of great humidity and relatively low tempera- 

 tures. Altitude 10,000 ft. 



Tambo Almirante, June 22-24. A tambo situated approximately 

 40 miles east of Chachapoyas in a small clearing in dense humid forest 

 on the east slope of the high cordillera between Chachapoyas and 

 Moyobamba. The telegraph station of Uchco is situated some six 

 miles below. Altitude 5,000 ft. 



Poco Tambo, June 28-29. A tambo near which are a few small 

 farms surrounded by heavily forested mountains one short day's travel 

 beyond Tambo Almirante. This is near the foot of the Andes and a 

 few miles beyond is the so-called "Bajada de la Ventana" from the top 

 of which one looks over an apparently limitless plain. Altitude 4,000 ft. 



Tambo Yaku, July 1-6. A well known tambo on the relatively 

 level plain about 30 miles west of Moyobamba. It is situated at the 

 edge of heavy forest but the vicinity is characterized by large open 

 grassy campos alternating with irregular light forest of small trees 

 and bushes with many heavy growths of brake ferns and club mosses. 

 The village of Rioja is some eight miles to the eastward. Altitude 

 3,000 ft. 



Moyobamba, July lO-Aug. n. Moyobamba is situated on a bench 

 just above the bank of the Moyobamba River which at this point is 

 navigable for launches and light draft boats although communication 

 with the Huallaga is broken by rapids farther down stream. The 

 surrounding plain is but slightly broken and the forest is mostly light 

 and bushy with frequent clearings not all of which are artificial. Never- 



