EXPEEIMEXT STATION^ REPORT. C57 



detailed to make a careful inspection of city conditions, and a copy of 

 his report detailing breeding places located was supplied to the 

 board. Almost or quite all of the places were abated before the end 

 of the season. 



The Essex County Park Commission was interested in the work, 

 and, after a preliminary inspection by Mr. Brehme, the writer went 

 over the ground with the secretary of the commission, Mr, Alonzo 

 Church, and advised as to the line of action to be pursued. It is to the 

 credit of the commission that every suggestion made was carefully 

 carried out, and with the result that practically no mosquitoes were 

 bred anywhere within the park system — which is not saying that no 

 mosquitoes were to be found in the parks at times. 



On the marshes the work done in 1904 approved itself in every 

 particular. A very little additional ditching was found necessary ; but 

 every ditch that had not been interfered with worked perfectly, and 

 altogether the whole marsh area except the so-called Ebeling tract was 

 in excellent condition and not a mosquito developed on it. During 

 the summer the board of health maintained a special inspector on the 

 meadows, whose business it was to see that the ditches were not 

 interfered with, and it is due to his efforts that, even on the Ebling 

 tract, no larvae developed until after September 1st. 



Early in the season conditions on the meadow were so good that 

 invitations were issued by the Conference Committee on Mosquitoes 

 for a meeting to be held on the meadow during the first days of June, 

 and a large attendance was secured, including the secretary of the 

 State Board of Health and representatives of many neighboring locali- 

 ties. At that date the Elizabeth meadows had just liberated its first 

 brood, which had extended into the city; but on the Newark meadows 

 not a larva or pupa was to be found and only an occasional adult — a 

 migrant from the southern territory. 



Kewark, at present may be considered as almost free from mos- 

 quito-breeding territory, and were the city dependent only on the 

 local production the insect would be so rare as to be practically un- 

 noticed. The onlv bad area that remains — the Ebeling tract — is to be 

 dealt with in the near future. It is within bounds to say that not over 

 one per cent, of all the mosquitoes found in Newark during the season 

 of 1905 were bred within its limits. 



Incidentally the elimination of Newark as a marsh breeder made 

 it possible to make some interesting observations on the migrations of 



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