Figures 330-332 



330. Nearly complete defoliation of aspen by M. disstria in Chippewa 

 National Forest, near Cass Lake, Minnesota. (Photo courtesy U.S Forest 

 Service). 



331. Cocoons of AI. disstria webbed together and between aspen leaves near 

 Two Hills, Alberta. Larvae which pupated earliest webbed the leaves together 

 before the tree was completely defoliated by slower maturing larvae. Anywhere 

 from one to ten or more cocoons may be found in each clump. 



332. Mature larvae of M. disstria resting on branches and trimks of aspen 

 in Superior National Forest, near Grand Marais, Minnesota. (Photo courtesy 

 U.S. Forest Service.) 



242 



