Bui. 597, U. S. Dept. of Agriculture. 



Plate II. 



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Larv/e of the Bot Flies, Gastrophilus. 



Upper.— Attachment of last-stage larvae and alveolar lesions upon the mucosa of the left sac 

 of the stomach. Lower.— Infestation of 317 last-stage larvae, with lesions in the center. 

 (Original.) 



