G4 



INSECTS INJURIOUS TO STAPLE CROPS. 



upon hatching, the maggots pierce the skin and live inside 

 by absorbing its juices and tissues. When full-grown the 

 maggots leave the locust, descend into the earth, and there 



transform to pupae inside of their cast skins, and from the 

 pupa? the adult flies emerge in due time. 



The maggots of one of the Bee-flies (Systcecltus oreas) 

 feed upon grasshopper-eggs, but their life-history is not 



