Cockroaches, Locusts, Grasshoppers, and Crickets 139 



Remedies there were practically none; when the summer hosts laid 

 their eggs in the ground for the one generation that could be reared in the 

 invaded land, these eggs could be plowed up, a remedy that is used with 

 much success in the far western locust-infested states; also when the wingless 

 young "hoppers" appeared in the spring they could be crushed by heavy 



FIG. 171. The American locust, Schistocerca americana, female. 

 (After Lugger; natural size.) 



rollers drawn across the fields by horses, or burned by scattering straw over 

 the helpless host and lighting it. Both of these remedies are also used in 

 western locust-fighting. But against the winged adults there is little that 

 can be done. 



In Asia and South America, where there are also migratory locusts (of 

 different, much larger species) the natives sometimes try to frighten away 

 an alighting swarm by smoke and noise, but such a swarm as that which 

 passed over the Red Sea in November, 1889, spread out for over 2000 square 



