CONTENTS. 
Social life of wasps .. os oot owe oe * 
Relation of the queen wasp to ‘the workers . ee 
Contrasted with that of the queen bee ie ee ee 
Loss of the queen’s power of making paper. . 
Appearance of the males and females ee ee ee 
Dispersion of the colony ee oe ee oe ve 
Age of wasps .. oe ee 
Physiological summary of the hoary of a @ swarm 
Domestic habits of wasps .. ee ee ee oe 
Manner of feeding .._.. oe ee . 
Of cleaning the nest .. ee : ° 
Wasps incapable of combined efforts like tes os 
Sleep of wasps .. - oe ee oe ee 
Diseases to which wasps are oe oe ee 
Cuaprmr IX.—EXPERIMENTAL INQUIRIES. 
Results of the removal of the nest with the queen 
Reconstruction of the nest : 
Plan of the new structure 
Succession of nests .. As ai a e ee 
Division of the swarm. ‘ = 
Artificial direction of their labo . 
Effects of the loss of the queen wasp and queen hea counekedlsy 
Principle of Parthenogenesis ‘ ve ee ee 
Explanatory of these effects .. ‘ ee a a 
Details of experiments on nests without queens .. eee 
Observation of a nest with only drone brood 
General conclusions oy ve 
EXPLANATION OF THE PLATES. 
Plates I—IV. Figures of the several species. 
Plates V—XIV. Drawings of the nests, 
Plate XI. To face title. 
