CONTENTS 



I. INSECTS IN THEIR RELATION TO THE ANIMAL KING- 

 DOM 9 



II. INSECTS IN THEIR RELATION TO PLANTS AS BENE- 

 FACTORS 21 



III. INSECTS IN THEIR RELATION TO PLANTS AS DE- 



STROYERS 40 



IV. INSECTS IN THEIR RELATION TO EACH OTHER 84 



V. INSECTS IN THEIR RELATION TO THE ANIMALS THAT 



FEED ON THEM 130 



VI. INSECTS IN THEIR RELATION TO WEATHER AND DIS- 

 EASES THAT AFFECT THEM 138 



VII. INSECTS IN THEIR RELATION TO OTHER ANIMALS. ... 1 53 



VIII. INSECTS IN THEIR RELATION TO MAN: AS BENEFAC- 

 TORS .... , 185 



IX. INSECTS IN THEIR RELATION TO MAN: AS CARRIERS 



OF DISEASES *99 



X. INSECTS IN THEIR RELATION TO THE HOUSEHOLD.. . 217 



XI. INSECTS IN THEIR RELATION TO THE FARMER AND 



FRUIT-GROWER 249 



XII. THE WAR ON INSECTS 271 



INDEX 309 



