8 



American Midland Naturalist Monograph No. 3 



hung from the hmb of a tree with the hght approximately 51/2 to 6 feet from 

 the ground. Care must be exercised in selecting trap locations. Traps should 

 not be located near buildings where animals are housed, in the vicinity of 

 lights which may serve as counter attractants, in locations open to prevail- 

 ing strong winds, near industrial plants giving off a large amount of smoke 

 or gas which might possibly serve as a repellant, or where any other existing 

 condition would tend to cause abnormal mosquito catches. 



The New Jersey trap should be placed on a regular schedule of opera- 

 tion of 3 to 7 nights each week throughout the mosquito-breeding season. It 

 is usually operated from 7:00 P. M. to 7:00 A. M. in this region. A 25- or 

 40-watt frosted bulb is generally used, and an automatic time switch may be 

 provided to start and stop the trap, or it may be turned on and off by hand. 

 The mosquitoes from each collection should be promptly separated from 

 other insect specimens to prevent molding and placed in properly labelled pill 

 boxes for subsequent identification. 



Light traps have been widely employed by mosquito-abatement districts 

 in the United States for making comparative studies in connection with the 



Fig. 1 . Artificial shelter for measuring mosquito densities 

 (U. S. Army Signal Corps photograph). 



