THE ANNALS OF 

 APPLIED BIOLOGY 



THE OFFICIAL ORGAN OF THE ASSOCIATION 

 OF ECONOMIC BIOLOGISTS 



EDITED BY 



E. E. GREEN, Way's End, Camberley 



LATE GOVERNMENT ENTOMOLOGIST, CEYLON 

 WITH THE ASSISTANCE OF THE COUNCIL 



VOLUME VII 1920-21 



CAMBRIDGE 



AT THE UNIVERSITY PRESS 

 1921 



