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 grouud, 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) 



HOUSEHOLD INSECTS 



Fig. 59 Red-legged locust 



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; & proboscis and palpus; c terminal antennal' joints; d head 

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

 div. ent., bull. 4, n. s.) 



