76 REPORT OF THE AGRICULTURAL RESEARCH 



REPORT OF THE IMPERIAL PATHOLOGICAL 



ENTOMOLOGIST. 



(F. M. Howlett, B.A., F.E.S.) 



I . — Administration. 



I was in charge of the section for the whole of the period 

 dealt with in this report. Mr. P. G. Patel was absent on 

 privilege leave for one month and six days from April 14th, 

 Mr. H. N. Sharma for two months and eight days from 

 October 16th, and Mr. J. L. Mitter for two months from 

 October 16th. 



II. — Educational. 



Messrs. C. S. Swaminath and J. L. Mitter appointed to 

 Pusa by the Medical Research Association, finished their 

 period of training here and have been taken over by the 

 Medical Research authorities. Mr. Mitter has joined 

 Major Mackie in Assam to assist in the Kala-azar investiga- 

 tion now in progress, while Mr. Swaminath is working with 

 Colonel Adie in Kasauli at the transmission of Halteridium 

 by flies of the genus Lynchia. 



III. — Research. 



My personal attention has been largely devoted to an 

 attempt to work out methods of insect-control by examining 

 and taking advantage of the reactions of insects to parti- 

 cular stimuli which seem to influence to a very large extent 

 their more important activities. The lines on which one 

 branch of this work is proceeding are indicated in an article 

 on " The effect of oil of Citronella on two species of Dacus " 

 [Trans. Ent. Soc, London, 1912, p. 417), and the results so 

 far obtained encourage the hope that considerable improve- 

 ments in our present methods may result from enquiry on 

 these and similar lines, though these possibilities have 

 hitherto been very largely neglected by entomologists. 



