Technical Bulletin 1 49, U. S. Dept. of Agriculture 



PLATE 1 



A and B. — Types of cages used in inoculation experiments with adult bees, 



C— Brood dead of Aspergillus mycosis produced experimentally by inoculation with a culture of 



AspeTQiUus effusus on a brood comb. 

 D.— Larvae recently dead of Aspergillus mycosis caused by the penetration of the larval skin by 



germ tubes of A. flavibs. 



