Insecta. 



ii 



After a time rudimentary wings appear. In all such cases 

 as this, where the young are hatched in essentially the same 

 form as the adult, the development is said to be direct. 



Injury done by Grasshoppers. Ancient history records 

 plagues of locusts. (The name "locust" is the proper one 

 for our common grasshopper.) And in modern times and 

 near-by places there have been migrations of locusts in 

 such numbers that they have darkened the sky, and, light- 

 ing everywhere, have devastated the land by eating almost 



FIG. 6. GRASSHOPPER LAYING EGGS. 



From Hyatt's Insecta 



every leaf and tender stalk of grass, crops, and trees in 

 garden and field. The Rocky Mountain locust, migrat- 

 ing eastward, almost produced a famine in Kansas and 

 Nebraska, and created terror beyond the limits of its actual 

 ravages. But, fortunately, the young hatched in the lower 

 states are not healthy, and die prematurely ; hence the 

 plague has not spread so extensively as it threatened to do. 

 Packard says that the Rocky Mountain locust, within a 

 period of four years, inflicted a loss of $200,000,000 on the 

 farmers of the West. 



