454 AGRICULTURAL EXPERIMENT STATION. 



be)'-ond Colwell Avenue, which crosses the meadow, there are no 

 more depressions and no breeding can occur. 



From Sewaren northward to the Rahway River, the meadow 

 bordering the Arthur Kill breeds mosquitoes in almost all its 

 parts, though not very abundantly anywhere. The marsh is well 

 drained by creeks and ditches and close to these no mosquitoes 

 breed. The pools are not numerous and reed grass covers a 

 large part ; which indicates a usual covering of water. Many of 

 the pools are crowded with fish, as are also the reed-covered 

 patches. Breeding may occur, to some extent between the reeds. 

 HI open spaces, when most of the water has evaporated. 



Altogether Rahway has perhaps the cheapest and easiest task 

 of the larger cities owning or adjacent to salt marshes. 



CHAPTER VII. 



REPORT ON INVESTIGATIONS MADE ALONG DELA- 

 WARE BAY FROM SALEM CREEK 

 TO DENNIS CREEK. 



It was impossible during the season of 1903 to cover any of the 

 area along the Delaware River and Bay in a systematic manner. 

 From personal visits to various points along the river and in the 

 interior, and from the reports of correspondents, I felt quite 

 certain that no breeding places existed north of Salem. At that 

 point the river banks are high, the fresh water dominates, and 

 there are no salt marshes. Alloways Creek may, perhaps, be 

 fixed as the northern limit of true salt marsh area along the New 

 Jersey shore of the Delaware, and, of course, this also limits the 

 breeding of the marsh mosquitoes. 



A large number of creeks extend inland from the bay shore. 

 some scarcely reaching the highland, others of considerable size 

 coming from the east side of the elevated ridge that runs roughly 

 parallel with the Delaware and at some distance back. This is 

 joined north of Clayton by a ridge running northwest from the 

 Cape May peninsula, forming a basin from which the Maurice 

 River carries most of the water, with the Cohansey Creek form- 

 ing a good second. The marsh mosquitoes dominate this entire 

 territory and are often excessively abundant not far from the 



