Registered at the G.PO. for Transmission to Canada and Newfoundland by Magazine Post. 



VOL. VII. Sep. B. Part 12.-PP. 181-196. DECEMBER, 1919. 



THE REVIEW 

 OF APPLIED 

 ENTOMOLOGY. 



SERIES b: medical 



AND VETERINARY. 



( JAN 1 9 192^ 



ISSUED BY THE IMPERIAL "^^i^^m^^ 



BUREAU OF ENTOMOLOGY 



LONDON: 



SOLD BY 



THE IMPERIAL BUREAU OF ENTOMOLOGY, 

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



Price 6d. net. 



All Rig-hts Reserved. 



