INTRODUCTION 13 



habits, its relations to other animals, whether as friends, as 

 enemies, or as prey, to the vegetable kingdom, and to its 

 physical surroundings, such as temperature, humidity, etc. 

 In a word, the whole question of the relation of the organism 

 to its environment gives us a final and most important 

 branch of Natural History which has been called Ethology 

 or Bionomics. 



