D.L. 



H. 



H.L. 



[Frojn a pltotograpli lent by the Department of Agriculture and 

 Technical Instruction, D«b!i?i.] 



li'iG. 2. — i'oi'tiou (if comb affected by foul brood, bi a less advanced 

 stage than Fi;;. 1. The riiised cappings indicate that there is a good 

 deal of healthy brocd, but the presence of diseased brood all over the 

 comb js indicated by the sunken cappings. 



H. A. group of cells containing healthy brood ; similar cells being 

 observable all over the comb. 



D. Two groups if cells containing diseased brood of which there are 

 many more. 



B." Healthy bees emerging from their cells. 



H.L. Healthy larvas. 



D Tj. Diseased larvEe. Note that these larvae are not lying like the 

 liealthy larvso. 



