Reglatered at the Q.P.O. for Tranamlaalon to Canada and Newfoundland by Magazine Post. 



VOL. VIII. Sep. A. Part 12.~pp, 513-544. DECEMBER, 1920. 



THE REVIEW 

 OF APPLIED 

 ENTOMOLOGY 



SERIES a: agricultural. 



ISBUBD B7 THE IMPEBXAL 

 BUREAU OF ENTOMOLOQT. 



LONDON 

 THE IMPERIAL BUREAU OF ENTOMOLOGY. 

 88, QUEEN'S GATE, S.W. 7, 



Price Is. 4-cl. net. 



Ail Rights Reserved. 



n 



