GROWTH OF INSECTS. 



75 



food. Insects generally lay their eggs in such places that 

 the worm, or caterpillar, coming from them can easily find 

 access to its proper food, and this food in the case of most 

 caterpillars consists of leaves, or the wood, bark, or juices, of 

 plants and trees. 



72. Commencing with the egg, the pupil should get, if 

 possible, the insect while in the act of depositing her eggs, 

 and this will not be difficult to do in the case of the canker- 

 worm moth, whose caterpillars commit such ravages upon 

 the elm-trees. 



5 a c d 



a f 



FIG. 77. CANKER-WORM MOTH, EGGS, AND WORMS: a, Female Canker-worm Moth laying 

 her Eggs, b; c, Top-View, and c7, Side- View of an Egg magnified; e, Canker-worm eat- 

 ing its way out of the Egg, magnified ; ./; Magnified View of Canker-worm ; g, Natural 

 Size of Canker-worm after leaving the Egg ; h, Male Canker-worm Moth. 



The female of the canker-worm moth has no wings. 

 They are very common in early spring and in the fall, lay- 

 ing their eggs on fences. Fig. 77, , represents the female 

 moth depositing the eggs ; 5, the eggs being deposited upon 

 a chip which was cut from a fence while the female was at 

 work ; <?, represents a top view of one egg magnified ; cZ, 



