THE GRASSHOPPER 



21 



your feet and around your buildings, their jaws constantly at 

 work, biting and testing all things in seeking what they can 

 devour." 



Since then Rocky Mountain locusts have appeared atinter- 



FIG. 7. Three grasshoppers injurious to vegetation. 



A, Red-legged locust. (After Riley.) 



B, Differential locust. (A-fter Sanderson and Jackson.) 



C, Southern lubber grasshopper. (After Sanderson.) 



vals in destructive numbers in Minnesota, North Dakota, and 

 neighboring states, but have never been a real plague. Practi- 

 cally nothing can be done to prevent the injuries done by such 

 vast hordes of migrating insects. 

 Other grasshoppers, though not so notorious as the Rocky 



