38 



THE TENT CATERPILLAR. 



Remedy. The application, with a stiff brush, of the solution of 

 soft soap, recommended above, will probably effectually destroy 

 them. 



THE OYSTER-SHELL BARK-LOUSE (Aspi<1'm!<ix mnckiformu) . 

 This insect, shown in large numbers in Fig. 3-i, is injurious, by 



Fia. 34. 



sucking the juices of the branches of both voting and old trees. 

 It is most common among trees weak in growth. 



Remedy. It may be destroyed by brushing the branches over 

 lightly with pure linseed oil, or with the solution of soap. 



THE TENT CATERPILLAR (Clifsiocampa Americana). This insect, 

 so familiar to every one in its larva state, is illustrated, in all its 

 forms by Figs. 35 to 37. Fig. 35 shows the male fly, Fig. 3(3 the 



Fit,'. 35. 



female, and Fig. 37 the development c, the eggs, a, b, the cat- 

 terpillars and their nest, d, the cocoon. Its eggs, Fig. 35, c, are 



Fig. 



laid late in the summer around the small twig at the ends of the 

 branches, generally from two to three hundred in a cluster. 



