INJURING THE LEAVES. 



135 



state, where, after mating with the male, she deposits 

 her eggs in a single mass and dies. 



Remedies. — The increase of this insect is greatly 

 checked by several parasitic enemies, nearly a dozen 

 species of two-winged and four-winged flies being 

 known to prey upon it. The caterpillars may be 

 destroyed by spraying the infested trees with the 

 arsenites — Paris green or London purple ; or the 

 egg masses may be picked off the bark in winter. 



The Fall Web- worm. 



Hyphantria cunea. 



The work of few insects is more universally known 

 than that of the Fall Web-worm. Late in summer 

 and early in autumn the conspicuous, unsightly webs 

 of this pest may be seen in nearly every orchard and 

 hedgerow over a 

 large portion o f 

 the United States. 

 The adult is a 

 pretty, white moth 

 (Fig. 67, c), which 

 deposits eggs on 

 the leaves of vari- 

 ous trees early in 



d Fig. 67. Fall Web-worm : a, larva; 6, pupa ; 



summer. T hese c > motb - 



soon hatch into young caterpillars that begin at once 

 to spin a protective web. The young worms are of 

 a pale-yellow color, sparsely covered with hairs, and 

 have a black head and two rows of black marks 



