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- 

 cloras 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. \\ hereupon 

 she filled a calabash with cold water, and going to 

 the corner of the hut where the ants still continued 



