CHAPTER II 



THE GRASSHOPPER: A STUDY OF THE ENEMIES 

 OF VEGETATION 



Life originated in the water and made its early development 

 in the sea. But when, in the course of time, land suitable for 

 life appeared, vegetation became established there. By means 



Fig. 8. — The vegetation-covered land. 



of this vegetation the heat of the sunlight faUing on the land 

 became utilized by organisms (Fig. 8). When land vegetation 

 had become established it offered a rich feeding ground for 

 animals. Animals cannot, hke plants, make use directly of 



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