EVOLUTION 379 



early Arthropodan stock. As to the course and method of 

 the long life-story of insect races we still have much to learn ; 

 it is cheering to realise that in the facts of structure and 

 function, reproduction and inheritance, modification and 

 adaptation displayed in the insects around us to-day we have 

 some clues to help us in the solution of great and fascinating 

 problems. 



