54: THE EEPOET OF THE No. 36 



but the smaller portion seemed to consist of the smaller, darker, lankier form 

 which was thought to be the latter. It seemed only fair to conclude that while 

 C. salinarius played a part in forming this mosquito zone, C. pipiens was clearly 

 shown in this case to migrate a distance of 2.5 miles from the place of breeding. 



At the same time that an analysis of the mosquitoes on the wing is being made 

 a careful survey of the mosquito breeding places should go forward. A seasonal 

 map of the more or less permanent breeding places should be made. 



Preparing Plans for the Elimination of Breeding Places. 



Having determined the nature of the mosquito fauna and its source, the next 

 step is the preparation of plans for the elimination of the breeding places. In 

 most cases this involves the solution of .rather simple engineering problems for 

 most of the work will be of a drainage character. Plans for the adequate treat- 

 ment of each place should be prepared. The preparation of this phase of the 

 report may involve the consideration of breeding places, either fresh or salt, exist- 

 ing entirely outside of the protected area. 



The actual working out of such a plan is well illustrated in the effort at 

 Princeton, New Jersey. Here each breeding place of a reasonably permanent char- 

 acter has been charted. The type of written matter accompanying this chart 

 gives a description of each place or group of places, describes the methods that 

 should be used in eliminating the breeding, and presents an estimate of the cost of 

 the operation. A simple description of one of the breeding places runs about as 

 follows : " District Number V is an old basin once a part of the D, and E, canal 

 system but long since abandoned. The stagnant water is sheltered from the winds 

 by surrounding trees and the banks are shallow and overgrown with vegetation. It 

 is 130 X 300 feet and has some surface drainage into Stony Brook. Its bottom 

 has at certain points as low an elevation as 52.6 feet above sea level, which shows 

 that the drainage will have to be supplemented by a fill. 



" The Committee recoiramends that an open ditch be cut from this hasin to the 

 nearest point of Stony Brook at a cost of from $15 to $20; and that the earth thus 

 removed be used to help fill the remainder of the basin to a level of 53.1 feet or more. 

 This will require 2,655 cu. yards. Part of the earth may be taken from the banks and 

 higher levels in the vicinity, but still more must be obtained elsewhere. The cost of 

 moving the soil and making .the fill should be about $1,250. About $100 should be allotted 

 to clearing off the weeds and bushes that will obstruct the ditching and filling operations." 



In this way a comprehensive plan of operations and a fairly accurate estimate 

 of the cost of the initial work necessary for mosquito control in a specified locality 

 can be prepared. 



Obtaining Funds. 



After reasonably accurate plans and estimates are in hand the problem of 

 obtaining funds must be solved. It is safe to assume that if the work has been 

 carried to the stage of completed plans and estimates some one person or some 

 group of persons possessed of a considerable amount of energy and initiative is 

 deeply interested in the success of the movement. If the mover coincides with the 

 person or group who must furnish the means, this problem is extremely simple, 

 but, if on the other hand, the funds must come from a group of large size or from 

 the general public its solution becomes more difficult. 



Two ways of getting funds are then open. The person or persons interested 

 may go about among the landowners and residents of the afflicted districts and 



