INJURIOUS AND BENEFICIAL INSECTS 



33 



67 Grasshoppers. A number of species attack various crops. 

 Occasionally they occur in very large numbers. The eggs are 



deposited in the 

 ground, and are fed 

 on by the young of 

 certain blister bee- 

 tles. 



Treatment: place 

 poisoned baits near 

 crops to be protected. 



Fig. 58 Rocky mountain locust: a, a, a female in different 

 positions ovipositing; b egg-pod extracted from the ground, with 

 the end broken open; c some separate eggs; d, e a section show- 

 ing an egg-pod placed and another being placed; /where a pod 

 has been covered up (after Riley) 



Fig. 59 Red-legged locust 



HOUSEHOLD INSERTS 



68 House fly (Musca domestica). Easily recognized as 

 the more common fly around houses. It breeds in manure and 



Fig. 60 House fly: a adult male; h proboscis and palpus; c terminal antonnnl joints; d head 

 of female; e puparium; /anterior spiracle, all enlarged (after Howard and Marlatt, U. S. dep't nRr., 

 V.1V. ent., bull. 4, n. s.) 



