ECOLOGY — INTERPRETATION OF ENVIRONMENT 353 



A pair of Varied-wing Locusts (Arphia xanthoptera) . Upper 

 figure, male icith spread wings: lower figure, female. The 

 male had yelloio, the female salmon-colored loings in life. 

 This species is often parasitized hij a gray Tachina 

 fly which deposits its eggs on the living indi- 

 vidual iL'hile it is in flight. The locusts' 

 eggs are laid in late Jidy and early 

 September. 



