448 NATURE STUDY. 



The outer wings are raised, and the inner edge of one 

 rubbed or scraped rapidly over the inner edge of the other. 



Bring out main differences, color, feelers, wings, thread- 

 like stylets at either side of end of abdomen. 



Life history. With the live insects before the children, 

 in different stages of development, tell them the life his- 

 tory of the grasshopper : how the mother bores a hole in 

 the ground (with the pointed " egg-placers " on the end 

 of her abdomen), and lays in it many eggs; how these 

 hatch into little grasshopper, much like their mother, but 

 with large head and no wings ; how, as each of these grows, 

 its skin becomes too tight, and splits open, and the grass- 

 hopper comes out with a new coat, at first soft, but soon 

 hardening ; how he thus gets a new suit of clothes several 

 times, each time becoming larger, and with longer wings ; 

 how at last the full-grown grasshopper comes out and stops 

 growing. 



Books for the Teacher. 



1. Morse's " First Book of Zoology " is helpful in the 

 study of structure. 



2. McCook's " Tenants of an Old Farm " has several ex- 

 cellent chapters on the habits of crickets. 



3. Hyatt's " Insecta " is good as a guide for the study of 

 structure. 



