72 REPORT OF THE AGRICULTURAL RESEARCH 



respiratory mechanism of Ticks and the influence of tem- 

 perature on rat-fleas; I may remark that the temperature 

 which was fatal to adult fleas was found to be unexpectedly 

 low. I also prepared several illustrations for Professor 

 Nuttall, made an experimental study of the effects of vari- 

 ous degrees of magnification and reduction in reproducing 

 drawings and wrote two articles [on (1) Mosquitos and 

 Temperature, (2) Methods of preserving Insects] which 

 were published in " Parasitology." 



Programme of work for 1911-12. — Work on blood-suck- 

 ing insects, ticks, and other similar parasites directly or 

 indirectly injurious to man will be continued, and atten- 

 tion will also be given to Dipterous pests of crops and fruit. 

 Instruction will be given to agricultural students in these 

 subjects. 



A large amount of time will have to be given to work- 

 ing through and arranging the material which has accumu- 

 lated during my absence, sent in by Medical and Veterin- 

 ary Ofiicers. 



Special investigations proposed are : — 



(1) Life-history and habits of Simulium (hill cattle- 



fly), the dung-infesting Cattle-flies, Sand-flies, 

 and such house-flies as are likely to be found 

 acting as carriers of intestinal diseases. 



(2) Bionomics of Mosquitos, with special reference to 



the influence of temperature. 



(3) Influence of external conditions on the life-history 



of Fleas. 



(4) Eeaction of Diptera to chemical stimuli. 



