/ 





THE REVIE 

 OF APPLIED 

 ENTOMOLOGY, 



SERIES B: MEDICAL 

 AND VETERINARY. 



(^ 



nn\on Jnsr';J:N 



VOL. IX. \ 



ISSUED BY THE IMPERIAL 

 BUREAU OF ENTOMOLOGY. 



LONDON : 



THE IMPERIAL BUREAU OF ENTOMOLOGY, 



41, QUEEN'S GATE, LONDON, S.W.7. 



1921. 



All Rights Reserved. 



