Bul. 597, U. S. Dept. of Agriculture. PLATE II. 
LARVA OF THE BOT FLIES, GASTROPHILUS. 
Upper.—Attachment of last-stage laryee and alveolar lesions upon the mucosa of the left sae 
of the stomach. Lower.—Infestation of 317 last-stage larvee, with lesions in the center. 
(Original.) 
