38 THE TENT CATERPILLAR. 



The Oyster-shell Bark-louse (Aspidiotux conchiformis). — 

 This insect, shown in larj^o numbers in Fio^. 34, is injurious, by 



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

 It is most common among trees weak in growth. 



Remedy. — It may be destroyed by brushing the branches over 

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



The Tent Caterpillar (Clmucampa 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. 36 the 



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. 36. 



laid, late m the summer around the small twig at the ends of the 

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



