liKMEDIES AGAINST MOSQUITOES 211 



vicinity of Oyster Bay, Cold Spring- Harbor, Lloyd's Neck, 

 and Center Island, to spend several thousand dollars in 

 this kind of work during- the summer of 1901, with the 

 sole view of reducing" the summer mosquitoes of that 

 region. This is mentioned as an indication of what might 

 be done at other points. 



Introduction of Fish into FishiiKj Ponds. 



It happens quite often that larger or smaller iionds will 

 be found which for some reason or other are considered 

 too valuable to drain, and which the owners will not per- 

 mit to be treated with kerosene, and yet in which mos- 

 quitoes breed abundantly. Such ponds will, as a rule, be 

 found to be milldams, ice-ponds, or pools artificially con- 

 structed with rock and cement bottoms for the purpose 

 of watering stock. Into such ponds it becomes absolutely 

 necessary to introduce fish that will destroy mosquito 

 larvte, which will otherwise invariably be found to exist in 

 them in great numbers. 



The subject of the appropriate fish to use for this pur- 

 pose has been considered in Chapter YII., and to that 

 chapter the reader is referred. 



Remedies Against Adult Mosquitoes. 



In regions where mosquitoes abound, all houses must, 

 as a matter of course, be thoroughly screened, if a meas- 

 urable degree of comfort is to be gained. The extreme 

 importance of the careful screening of windows and doors 



