ANIMAL MIGRATIONS 371 
hostile to myself, and they do not throw much 
additional light on their habits. Ecitons or For- 
aging Ants (called Cazadoras in Peru) seem to be 
true wandering hordes, without a settled habita- 
tion ; for a certain number of them may always be 
seen carrying pupse, apparently of their own species; 
but they sojourn sometimes for several days when- 
ever they come upon suitable food and lodging. . . . 
The first time I saw a house invaded by Caza- 
doras was in November 1855, on the forest slope 
of Mount Campana, in the Eastern Peruvian Andes. 
I had taken up my abode in a solitary Indian hut, 
at a height of 3000 feet, for the sake of devoting a 
month to the exploration of that interesting moun- 
tain. The walls of the hut were merely a single 
row of strips of Palm trees, with spaces between 
them wide enough to admit larger animals than 
ants. One morning soon after sunrise the hut was 
suddenly filled with large blackish ants, which ran 
nimbly about and tried their teeth on everything. 
My charqui proved too tough for them ; but they 
made short work of a bunch of ripe plantains, and 
rooted out cockroaches, spiders, and other suchlike 
denizens of a forest hut. So long as they were left 
unmolested, they avoided the human inhabitants ; 
but when I attempted to brush them away they fell 
on me by hundreds and bit and stung fiercely. I 
asked the Indian's wife if we had not better turn 
out awhile and leave them to their diversions. 
" Do they annoy you " said she. "Why, you see 
it is impossible for one to work with the ants 
running over everything," replied I. Whereupon 
she filled a calabash with cold water, and going to 
the corner of the hut where the ants still continued 
