€34 NEW JERSEY AGRICULTURAL COLLEGE 



jiiid we have never fouiul wrigglers in sneh places. So, also, there 

 is a considerable black nmd, swampy area between Morris turnpike, 

 Millburn avenue and Short Hills road, which looks nasty, but 

 where absolutely no w^riggiers were found and where none w^ere 

 found at any time later in the season. 



In the southeastern portion of the township is a large, low area^ 

 mostly diy, at time of examination, but with a series of badly- 

 arranged ditches, which had no proper outlet. In these ditches 

 puddles had formed and many of these were swarming with 

 larvjE of C. sylvesiris. So at the sides of the road were a number 

 of pools, and some of these contained larva; of the same species. 

 Practically no large danger areas were found and the bulk of the 

 mosquito life in the township w^as developing in the pot holes. 



As to the Culex sylvesiris found breeding in the ditches and 

 along the roadsides, this favors open waters and swampy areas, 

 and rarely gets into real woodland pools. It does get imder the 

 trees, in some cases, but rarely occurs in pot holes. It has a suc- 

 cession of broods throughout the season, is not a vicious biter^ 

 flies for a considerable distance and gets freely on porches, though 

 rarely into houses. 



May iTth, the territory between South Orange and Millburn 

 w^as covered by Mr. Brehme, who found the pools pretty well 

 dried out; took no larvae and less than twenty adult mosquitoes, 

 all of them woods species, not definitely determined. 



May 22d, twelve adults were received from Short Hills, and all 

 were ah f id ill. 



May 27th, ]\[r. Grossbeek and Mr. Brehme drove over this area 

 together after a day and night of heavy rain. This had refilled 

 the dried-out depressions and had added to those that yet con- 

 tained water, but in only one place were wrigglers found. This 

 was in a pool that had turned foul before the rain and contained 

 one specimen of Anopheles and a number of the predatory Core- 

 thra larvic — producing the short-beaked mosquitoes that cannot 

 bite. As for adults, there were plenty of them. On the streets,. 

 in all the roads, on the porches, in the hotels — all C. cantator, and 

 hundreds of them. They simply covered the horse while driving 

 along the Rahway river. This was a salt marsh migration from 

 the Linden marsh, where brood 2 was on the wang, about May 

 21st, and proved to demonstration the necessity for the marsh 

 work before the local work could be expected to count. Mr. 



