52 THE AMERICAN MUSEUM JOURNAL 
covered areas, the latter type of country pre- 
dominating. 
It is in the dark swamps that the precious 
quebracho trees grow. It was also from these 
same swamps that clouds of ravenous mos- 
quitoes issued with the first signs of failing 
daylight, and drove us to the refuge of our 
net-covered hammocks. There we sweltered 
through the long hours of the night, listening 
to the angry buzzing of our outwitted assail- 
ants, which was not unlike the sound pro- 
duced by a swarm of enraged bees. I could 
distinguish a number of different pitches and 
qualities in the music, blending harmoniously 
in one general chorus. The varying size of 
the insects, which ranged from individuals 
nearly an inch long to the small, infection- 
bearing Anopheles, doubtless accounts for the 
different tones produced by the vibrations of 
the wings. Small brockets! were plentiful in 
1 Brocket: a small South American deer having 
unbranched horns. 
/ 
Through the courtesy of the Brazilian government, the steamer ‘‘ Nyoac’’ was turned over to the 
expedition for its exclusive use. 
traveled wherever they wished 
The men of the expedition lived on board for many weeks and 
A portion of the expedition’s camp at Utiarity, a village occupied by Parecis Indians. 
It is half 
a mile away that the river dashes over a precipice two hundred and fifty feet high. This proved to 
be a profitable collecting place for small rodents, birds and a few larger mammals 
