CONTENTS 



CHAP. PAGE 



I. SOME MICROSCOPIC BUILDERS g 



II. ISLAND AND REEF BUILDERS . . . 17 



III. THE SHELL-BUILDERS . . . . .27 



IV. SOME CURIOUS TUBE-BUILDERS . . . -43 

 V. FISH AS NEST-BUILDERS . . . . 56 



VI. WONDERS OF INSECT ARCHITECTURE: SOCIAL BUILDERS 65 



VII. WONDERS OF INSECT ARCHITECTURE : SOLITARY 



BUILDERS . . . * . 79 



VIII. ANTS AND TERMITES . . . . .100 



IX. WEAVERS AND SPINNERS . . . . .122 



X. MINERS, DIGGERS, AND CARPENTERS . . .163 



XI. SOME BIRD ARCHITECTS . . . . .189 



XII. SOME FOREIGN BIRD ARCHITECTS . . .210 



XIII. MAMMAL CRAFTSMEN ..... 240 



XIV. WORKERS IN PLANT TISSUES .... 250 



vu 



