220 
INDEX. 
Weismann, A., 52, 159 
Westwood, 74 
Willelmi, M., 169 
Wing, cells, 39 ; vibration, rate 
of, 44, 84 
Wings, 38, 73; compared, 46; 
depressors of, 45 ; develop- 
ment of, 161; booklets of, 
40, 46; why in two parts, 
38, 40 
Wolff, Dr. J., 24, 25, 45, 92, 
95, 1 14, 1 18 
Worker, antenna of, 21 ; bees, 
9, 190; combs on hind legs, 
36; food of larva, 10, 123; 
lunctions of, 9; glands of, 
1 13-125; head of, 18; jaws 
of, 22 ; legs of, 34-36 ; mouth 
parts of, 22; ovaries of, 150; 
smell hollows of, 91 ; voice 
of, 84; wings of, 46 
Workers, fertile, 9, 124, 150; 
ovaries of fertile, 150; func- 
tions of old, 9, 10, 13; func- 
tions of young, 9, 13; when 
they first leave the hive, 13 
Wyman, Dr. J., 178 
Y 
Yolk, or vitellus, 136, 154, 16 1 ; 
sac, 161 
Z 
Zoubareff, A., 95 
LONDON 
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