72 FIRST BOOK OF ZOOLOGY. 



In the spring and fall the eggs of the canKer-worm moth 

 may be found in abundance on fences and trees in cities. 

 They are very minute, and are found in clusters arranged 

 like stones in a pavement, but with greater regularity. With 

 a sharp knife a shaving of wood may be cut off, taking the 

 eggs with it. (See eggs in Fig. 77, 5.) 



If they are collected in the spring-time, little worms will 

 hatch from them in the course of a few weeks, and these 

 may be fed on the young leaves of the elm-tree. 



Eggs of other insects may be found on fences, leaves, and 

 twigs of plants ; also on the leaves of the squash- vine, and 

 other plants in the garden. 



Certain eggs may be found upon the twigs of apple-trees, 

 covered with a shiny coating, like varnish. For all these ob- 

 jects the pupils will have to hunt carefully, as only the keen- 

 est eyes will find them out. 



70. Caterpillars and grub-worms are found everywhere, 

 so common indeed that the pupil has only to examine the 

 fences as he goes to school to secure some. For certain 

 kinds of grub-worms, he may dig in the garden, follow 

 the furrow made by a plough, or tear the bark from 

 some dead tree, and discover the specimens he is in search 

 of. For chrysalides and cocoons the pupils may be di- 

 rected to search on old garden-fences, under stones and dry 

 boards. 



Some chrysalides will be found hanging with the large end 

 downward, as in Fig. 72 ; others will be found suspended 

 bv the small end, with a delicate thread around the middle, 



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