56 Prockedings Ninth Annuai, Mee'Ting 



ticular benefit in knowing just what mosquitoes are on the wing-. 

 You must, however, recognize the fact that there are breeding 

 places which will be overlooked, that there are breeding places 

 lying outside the protected territory from which mosquitoes 

 might migrate into the protected territory, that broods of mos- 

 quitoes do not emerge within a period of a few hours, but that 

 the emergence of a brood may cover a period of a number of 

 days. Without a knowledge of the mosquito fauna within the 

 territory to be protected you may be spending every ounce of 

 energy in finding and eliminating breeding places and yet mos- 

 quitoes may be exceedingly prevalent. Your best work may be 

 a failure from the standpoint of the people of your territory 

 unless you know the sources of mosquitoes which are troubling 

 them, because you may be putting your time and money on efforts 

 of comparatively little importance. 



Chairman ManchEE — Mr. Jackson, will you discuss this 

 paper for us? 



Mr. Edward W. Jackson — Mr. President, Ladies and Gen- 

 tlemen : It is only right that I should make an explanation of 

 my reason for being here and assuming to question the practical 

 or economic value of night collections. 



For some time I have been helping the mosquito commission 

 in Essex County in the classification of this night work, and, from 

 the results obtained and reported to the commission, I came to 

 the conclusion that night collections, as carried out in Essex 

 County, were of very little value. I am still of that opinion, and 

 so stated to the mosquito commission. 



It came to Dr. Headlee's hearing and he invited me here to 

 present . ly views on this subject. 



I desire to say that these views are personal. I do not repre- 

 sent the Essex County Mosquito Commission and I do not know 

 what their ideas are. This matter is brought up simply because 

 Dr. Headlee felt that, as there was someone who had a different 

 viewpoint on the subject of night collections, it might be well to 

 have it presented at this convention. 



Night Collections — Do They Help in the Extermination of the 



Mosquito? 



THE FACTS. 



It has been the practice of the Mosquito Extermination Com- 

 mission in Essex County to collect adult mosquitoes on the 

 wing on designated nights during the early hours after sundown. 

 These collections are called "night collections." 



