The Mosquitoes of New Jersey 169 



Bearing of These Fads on the Problem of Control 



The facts just set forth show clearly that flights of salt-marsh, 

 fresh-water swamp, malarial and house mosquitoes may seriously 

 interfere with the project of keeping a specified locality free from 

 mosquitoes, and indicate that plans and estimates for practical con- 

 trol work must be based on something more than a study of. the 

 mosquito-breeding places within a specified area — must include an 

 analysis of the mosquitoes on the wing throughout the said locality 

 for at least one summer season. They show further that the prac- 

 tical work of control must be accompanied by a thorough knowledge 

 of the adult mosquitoes that are abroad in order that the trouble due 

 to local breeding may be distinguished from that arising from inva- 

 sions, and in order further that the sources of the invading pests may 

 be found and eliminated. 



Mosquito Surveys 



A good contour map should be secured on a scale of at least 12 

 inches to the mile. A careful search for mosquito-breeding places 

 should be made and all permanent ones should be shown on the map 

 and each given a number. The detailed report, which should be 

 prepared, should discuss each place in detail and show not only the 

 type of elimination deemed best but should indicate the cost of the 

 operation. Careful record of the temporary breeding places found 

 should be kept and the report should indicate the amount of labor 

 their suppression will probably entail. 



A series of maps, preferably of a contour type, showing the mos- 

 quitoes on the wing for at least one summer season, should be pre- 

 pared. There will be one map for each month of the season. The 

 report should analyze their breeding and indicate the sources from 

 which the mosquitoes come. 



The environs of the area should be studied for possible sources 

 of mosquitoes occurring within the area, and the report should in- 

 dicate the importance and the means of getting rid of these outside 

 breeding places. 



A careful study of the nature of the organization necessary to car- 

 ry out the mosquito-suppression work in the district must be made 

 and the report should make definite recommendations and present 

 definite estimates. 



The survey should result in fully developed plans and estimates 

 for efifective work. 



