Vol. VII, No. 4 



February, 1921 



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 



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CAMBRIDGE UNIVERSITY PRESS 



C. F. CLAY, Manager 

 LONDON : FETTER LANE\ E.C. 4 



also 



H. K. LEWIS & CO., LTD., I 3 6, GOWER STREET, LONDON, W.C. I 



WILLIAM WESLEY & SON, 28, ESSEX STREET, LONDON, W.C. 2 



PARIS : LIBRAIRIE HACHETTE & CIE. 



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TOKYO : THE MARUZEN-KABUSHIKI-KAISHA 



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