2d 



E HE HEARTS OUTLINES OF 



suffer no injury from their early appearance. There is but 

 a single yearly brood. When there are large numbers of 

 larvae they swarm and defoliate acres of shrubbery. They 



Fig. 17. Fig. 18. 



Forest Tent Caterpillar, Moth and Egg-mass. 



attain their growth in June, pupate, emerge the same year, 

 and lay their eggs in vertical belts around the twigs. These 

 belts are covered with a mucous which is sometimes so 

 thick that the eggs cannot be seen. 



COMMON TENT CATERPILLAR 

 \C . Americana,) 



of our orchards does not essentially differ in its habits. Its 

 egg masses may be distinguished from the fact that they 



Fig. 19. Fig. 20. 



Moth and Egg-mass of the Common Tent Caterpillar. 



