86 



Tlie Rocky Mountain Locust. 



sun. On the horizon they often appear as a dust tornado, 

 riding upon the wind like an ominous hail storm, eddying 

 and whirling about like the wild dead leaves in an autumn 



[Fig. 14.] 



A Swarm op Locusts falling upon and devouring a Wheat-field. 



storm, and finally sweeping up to and past you, with a 

 power that is irresistible. They move mainly with the 

 wind, and when there is no wind they whirl about in the 

 air like swarming bees. If a passing swarm suddenly 

 meets with a change in the atmosphere, K such as the 

 approach of a thunder-storm or gale of wind, they come 

 down precipitately, seeming to fold their wings, and fall 



