X 
Contents 
CHAPTER IV 
THE CYCLE OF THE YEAR 
Brood-rearing — Brood-rearing during the season — Tem- ' A ** 
perature of the hive — Swarming — Preparation for swarm¬ 
ing— Issuing of the swarm — Stimulus to leave the hive — 
Behavior of issuing swarm — Clustering — Supposed aids to 
clustering — Scouts — Entering the new home — Parent col¬ 
ony — Mating flight — After-swarms — Activity of swarms 
— Swarming conditions induced artificially — Peculiarities 
of bees in swarming — Causes of swarming — Swarming- 
out — Gathering of nectar and storing of honey — Collec¬ 
tion of other materials — Killing of the drones — End of 
brood-rearing — Winter cluster — Movements in winter _ 
Responses to outside temperature — Conservation of heat 
— Source of heat — Effect of accumulation of feces . . 54-92 
CHAPTER V 
THE LIFE OF THE INDIVIDUAL IN RELATION 
TO THE COLONY 
Developmental stages — Cellular structure of tissues — 
Egg — Early embryonic development — Later embryonic 
development — Segmentation — Fate of parts of the embryo 
— Larval development— Metamorphosis — Length of devel¬ 
opmental stages — Cycle of duties of the adult worker bee 
— Division of labor — The labor within the hive — Comb 
building —Feeding of larvaj — Composition of larval food 
— Feeding of queen and drones — Other inside work — The 
guarding of the colony — The labor outside the hive — Divi¬ 
sion of labor in gathering— Pollen gathering — Propolis col¬ 
lection — The collection of water — Duration of life — Work 
determines length of life — Practical applications — Possible 
determining factors. 93-131 
CHAPTER VI 
THE LIFE PROCESSES OF THE INDIVIDUAL 
General plan of the body of the bee — Head — Thorax — 
Abdomen — Digestion — Circulation — Metabolism — Res¬ 
piration — Excretion — Locomotion — Protective apparatus 132-161 
