INSTITUTE AND COLLEGE, PUSA, FOR 1910-11. 71 



on an egg-parasite of our common hot weather Tabanus 

 {T. alhimedius) ; (2) temperature reactions of Mosquitos; 

 I believe I have found that temperature constitutes at least 

 one of the main factors controlling mosquito-bite; more ob- 

 servations are required, and the work is still in progress; 

 (3) the relative efficiency of " millions " and other enemies 

 of mosquito-larvae, in progress ; (4) Peach-flies ; with regard 

 to these last it seems improbable that their attacks can be 

 completely prevented by anything short of netting the trees, 

 but we have now a cheap and simple method (depending on 

 the " chemico-sexual " reactions of the male flies) whereby 

 the damage they do may be very much reduced. 



A number of publications are in hand. Four students 

 have been received, though it was impossible to allot them 

 any window-space in which to work. 



While absent on sick leave, I attended the First Inter- 

 national Congress of Entomology at Brussels, and though 

 unable to enjoy the lavish hospitality which was displayed 

 by the Congress Officials towards all visiting delegates, I 

 was present at all the meetings and read two papers, by 

 Mr. Lefroy and myself. These will be published in the 

 Proceedings of the Congress. From the scientific point of 

 view, the Congress was most successful, the great majority 

 of the papers read being of a high standard of excellence, 

 and I cannot overestimate the value of this opportunity of 

 getting into touch with recent work, and of meeting and 

 exchanging views with Entomologists of other countries. 



In connection with a plague of house-flies near Norwich 

 I carried out (in collaboration with Dr. Copeman, F.R.S., 

 Medical Inspector to the Local Government Board, and Mr. 

 Merriman) what I believe to be the first successful series of 

 experiments on the range and rate of flight of these insects 

 under natural conditions, a point of considerable import- 

 ance with regard to disease-transmission. The results are 

 published in " New Series No. 53 of the Local Government 

 Board Reports on Public Health and Medical Subjects." 



Prior to sailing for India I spent five weeks in Cam- 

 bridge, working in Professor Nuttall's laboratory on the 



