Bui. 780, U. S. Dept. of Agriculture. 



Plate 1 1 . 



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Photographs of Sections of the Stomach of the Honeybee as Seen 

 Through the Miscroscope. 



A, entire cross section of stomach (queen) and Malpighian tubules, showing infection of these organs 

 with Nosema apis: B, a portion of A more highly magnified; C , a small portion of a longitudinal 

 section of a stomach from a healthy hee; D, similar to C, but from a Nosema-infected bee; K, infected 

 epithelium highly magnified, the disease as seen in America; F, similar to E, but from a preparation 

 made by Zander in Germany. (Original.) 



