SECOND REPORT 



ON 



ECONOMIC BIOLOGY 



BY 



WALTER E.^COLLINGE, M.Sc., F.L.S., F.E.S., 



Foreign Member of the American Association of Economic Entomologists 

 Joint Honorary Secretary of the Association of Economic Biologists ; 

 Editor of the ' ' Journal of Economic Biology ' ' ; Honorary 

 Consulting Biologist to the Land Agents' Society, the 

 Midland Reafforesting Association, and the War- 

 wickshire Agricultural Society ; and late Special 

 Lecturer on Economic Zoology in the 

 University of Birmingham. 



ILLUSTRATED. 



BIRMINGHAM : 

 THE MIDLAND EDUCATIONAL CO., LTD. 



1912. 



[All rights reserved.] 



PRICE 2s. 6d. 



