TENT CATERPILLAR 



235 



on which the eggs were deposited, enclosing it in a web and 

 tJie whole colony begins to feed on a single leaf adjacent 

 to it. After the first moult they pass to other leaves and 

 include large numbers of leaves and sometimes the whole 

 tree. The entire colony feeds within the silken web. None 

 of them go away to scatter over the tree. There are several 

 moults, about five. They pupate a little later in the season 

 and the adults issue in the following spring. Two broods 

 are known in some localities. It is a great pest in orchards 



p:X f-'^^^J 



Fig. 180. — The fall well worm {Hyphantria cunea) : o, dark larva from 

 side; 6, light larva from above; c, dark larva from above; rf, pupa, ventral 

 view; e, pupa from side; /. adult. All slightly enlarged. (After Riley.) 



and occurs on more than one hundred kinds of plants. The 

 web worms are so conspicuous that there is little excuse for 

 neglecting them and clipping off the newly formed web 

 with the end of the twig infested, or crushing or burning the 

 colony is so simple a matter that no one should permit 

 them to multiply. 



Tent Caterpillar (Clisiocampa amcricona). — This is some- 

 times called the American tent caterpillar. The Western form 

 is called the Western tent caterpillar. They are more com- 



