Vol. VI, No. 4 



April, 1920 



THE ANNALS OF 

 APPLIED BIOLOGY 



THE OFFICIAL ORGAN OF THE ASSOCIATION 

 OF ECONOMIC BIOLOGISTS 



EDITED BV 



E. E. GREEN, Way's End, Camberley (late Government Entomologist, Ceylon) 



WITH THE ASSISTANCE OF THE COUNCIL 



CAMBRIDGE UNIVERSITY PRESS 



C. F. CLAY, Manager 



LONDON : FETTER LANE, E.C. + 



also 



H. K. LEWIS & CO., LTD., I 36, GOWtR STREET, LONDON, W.C. I 



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



PARIS : LIBRAIRIE HACHETTE & CIE. 



CHICAGO: THE UNIVERSITY OF CHICAGO PRESS 



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TORONTO : THE MACMILLAN CO. OF CANADA, LTD. 



TOKYO : THE MARUZEN-KABUSHIKI-KAISHA 



Price Ten Shillings net 



