Registered at tfie G.P.O. for Transmission to Canada and Newfoundland 6}^ Magazine Post. 



VOL. X. Ser. B. Part 6.— pp. 117-182. 



JXJNE, 1922. 



The review 



OF APPLIED 

 ENTOMOLOGY 



SERIES B: MEDICAL 

 AND VETERINARY. 



ISSUED BY THE IMPERIAL 

 BUREAU OF ENTOMOLOGY. 



LONDON: 



THE IMPERIAL BUREAU OF ENTOMOLOGY, 

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



Price 8d. net. 



All Rights Reserved. 



