THE DIPTERA 



317 



Fio. 334. — Adult female Bot Fly {Gastrophilus iiasalis L.), nearly twice natural size. 



iFro7n U. S. D. A. Bull. 597.) 



Fig. 335.- — Nearly full-grown larvae (bots) of a Horse Bot Fly attached to the inside wall 

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



