THE DIPTERA 



317 



FIG. 334. Adult female Bot Fly (Gastrophilus nasalis L.), nearly twice natural size. 



(From U. S. D. A. Bull. 597.) 



FIG. 335. Nearly full-grown larvse (bots) of a Horse Bot Fly attached to the inside wall 

 of the stomach. (From U. S. D. A. Bull. 597.) 



