Registered at the Q.P.O. for Transmission to Canada and Neu/foundlan4 by Magazine Post. 



VOL. VII. Ser. B. Part 5.— pp. 69-84 MAY, 1919. 



THE REVIEW 

 OF APPLIED 

 ENTOMOLOGY 



«A\\sonian iT\r;fj 



SERIES B: MEDICAtJUN2 



AND VETERINARY. \5// 



Kj ■ ■> 



ISSUED BY THE IMPERIAL 

 BUREAU OF ENTOMOLOGY 



LONDON I 



BOUD BT 



THE IMPERIAL BUREAU OF ENTOMOLOGY, 

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



Price 6<t. net. 



All Rig-hts Reserved. 



