102 SCIENTIFIC REPORTS OF THE AGRICULTURAL RESEARCH 



Cut pieces of bamboo, which are filled with water and 

 placed out at Pusa as breeding-traps for some mosquitos, 

 attract most of the mosquitos which breed in hollows in 

 trees. The following species have been found breeding in 

 these bamboos and reared, viz., Stegomyia scutellaris, S. w- 

 album, Cyathomyia brevipalpis, Armigeres magnus and 

 A. obturbans ; of these S. scutellaris is attracted in the lar- 

 gest numbers and, next to that, S. w-album, the other species 

 being found only occasionally in such situations. 



The Mosquito Campaign on the Pusa Estate was con- 

 tinued on the lines noted in last year's report. Considerable 

 success was attained, the reduction of Stegomyia spp. during 

 the rains being particularly marked. % 



Experiments on the role of blood in the development of 

 the eggs of mosquitos were continued and the results pub- 

 lished in the Indian Journal of Medical Research. 



Eleven coloured plates, showing life-histories of mos- 

 quitos, were issued during the year. 



III. Publications. 



Sen, S. K. A preliminary note on the role of blood in 

 ovulation in the Culicidse (Indian Journal of Medical 

 Research, April 1917). 



IV. Programme of work for 1917-18. 



Work will be continued on the life-histories and control 

 of the insects and allied organisms which are concerned in 

 the transmission of disease to man and animals in India. 



