Bui. 671, U S. Dept of Agriculture. PLATE II. 





FiQ. 1.— Comb Containing Larvae Dead of Sacbrood. 

 Natural size. (White.) 





* ..'•'.. /../.> 





Fig. 2.— Stained Smear Preparation Showing Spores of Nosema apis. 



Highly magnified. (Original.) 

 SACBROOD AND NOSEMA SPORES. 



