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THE AMERICAN MUSEUM JOURNAL 



the first traces of the vampire bats 

 which later cost us two mules. These 

 blood-sucking mammals descended every 

 night, and in the morning the backs of 

 several of our animals would be wet with 

 blood. The bats attacked the spots on 

 the skin which had been chafed by the 

 packs and although we tried several 

 methods to keep them off, they con- 



trapping unsatisfactory; but the change 

 in the fauna and flora as each new level 

 was reached proved intensely interesting. 

 From rugged and barren cliffs at the 

 crest of the Andean pass, each day 

 brought more abundant foliage, until in 

 the mountains of the Yungas at an alti- 

 tude of five or six thousand feet, a profu- 

 sion of tropical growth appeared. 



A characteristic steep climb through the Andes. — The Bolivian Yungas between Todos Santos and the Ghaprea 

 rank, among the natural wonders of the world. Daily the changing vistas of palms, ferns and flowers, with cas- 

 cades and waterfalls, make a delightful background for the abundant bird life 



tinned the injuries, so that the mules were 

 slowly weakened, and there came a time 

 when^two of them could travel no farther. 

 The season was not good for collect- 

 ing since the birds were moulting and 

 the rains heightened the difficulties of 

 preserving the specimens and made 



It was very easy to get lost in the 

 thick jungles along the river beds. 

 Mr. Cherrie, having had experience 

 of this, arranged a gunshot signal to be 

 fired b\' any one who should lose himself 

 while hunting. A member of the party 

 on one occasion, wandering far from 



