8 
THE BEE HA 7 /OH 
Fig. 2. — Queen. 
mother bee, is a fully developed female, and is the 
only one capable of laying eggs which produce all 
the inhabitants of the hive. 
Dzierzon ( 37 ) propounded 
the theory that eggs in the 
ovary of the queen were all 
alike, but before laying those 
which could produce females 
she must mate with a drone; 
and Leuckart ( 93 ) and Sie- 
bold (153) proved that eggs 
destined to produce females 
were impregnated by intro- 
ducing into them a fertilising 
substance originally derived 
from the drone, and for controlling the flow of 
which they found special voluntary muscles. Eggs 
laid without the addition of this fertilising substance 
produce only drones. The 
fertilisation of the queen 
once accomplished suffices 
for her life. 
The object of the drones 
(Fig. 3), of which there may 
be several hundred in a hive, 
is to impregnate the queen, 
therefore they are usually 
found in the hive only dur- 
ing the summer months, 
when their services may be 3 -— 
needed. They are much more bulky than the queen 
