24 BEE CULTURE. 
only built in swarming time, or when the colony is rearing a 
Queen. The Worker or Drone cells are used not only for 
brood-rearing, but also for storing honey and pollen, or bee- 
bread. 
At first when the combs are built, they are generally trans- 
parently white, but with age and use for brood-rearing they 
become dark and opaque. The thin cocoons lining the cells, 
help to make them so; such are, however, just as valuable 
for breeding purposes for a long time, or until the size is 
materially diminished, thereby causing dwarfed brood. It is 
also valuakle for storing honey, where the Extractor is used. 
POLLEN OR BEE BREAD. 
This is the fertilizing dust, or fine meal-like substance, 
which the bees procure from the stamens of flowers. When 
deprived of bloom, they will take flour in lieu thereof. Bees 
collect pollen and carry it in their pollen baskets (Fig. 43, A.) 
to the hive and store it for daily or future use. 
When mixed with honey it is used to feed the young; 
older bees use it also for food, to elaborate wax, &e. 
Bees only gather one kind of pollen at a time. While 
different bees may carry in several colors at the same time, 
the pellets on any one bee will be all alike. 
Bees require water when comb-building and brood-rearing 
is going on, and should have access to it. 
PROPOLIS OR BEE GLUE. 
This is also collected, like pollen, by the bees, from resin- 
ous buds, and is used for fastening combs, coating uneven 
surfaces, and filling up cracks within the hive. They also 
sometimes use it in hermetically sealing up any offensive 
matter that may be too burdensome for them to remove from 
their hives. 
