ENEMIES OF PLANTS. 



327 



shelter on the o-rouncl under l)oar(ls, bark, etc., 

 and spin a silken cocoon (ki.i;. i 16, a), from 

 which, after a few weeks, the moth eniergfes. 



The apple and wild cherry are the trees most 

 usually attacked by these caterpillars, but they 



FIG. 117. BALTIMORE ORIOLE ATTACKING THE NEST OF THE 



AMERICAN TENT-CATERPILLAR. 



have been found upon the peach, rose, and other 

 members of this family of plants, as well as upon 

 forest and shade trees. 



Bacteria and parasitic ichneumon-flies, as well 

 as many birds, such as cuckoos, blue jays, crows, 



