698 MOSQUITOES OF NORTH AMERICA 



and before July 1st the adults were out in force. In the Black River Swamp 

 they were found in the same condition at about the same time and so, on June 

 30i±i, mostly pupa were found in woodland pools on the borders of Spring Lake, 

 near Trenton. July 21st, there was a young brood in the pools surrounding 

 Lake Hopatcong, and a few days later mature larvae and pupse were taken every- 

 where in pools in the Hackensack Valley. The entire Passaic and Hackensack 

 Valleys were kept under observation during 1903, as were also those large swamp 

 areas in Essex and Morris Comities and always sylvestris was the dominant 

 species. Captures of adults sent in from this territory always showed sylvestris 

 present, and that species breeding in a swamp area at Vailsburgh, become com- 

 mon in the sendings of adults from Montclair and South Orange. 



"From the region of the Delaware the open marsh areas almost always 

 turned out sylvestris in numbers. Mr. Grossbeck found it the dominant species 

 between Trenton and Bordentown. Mr. Seal sent it in by the hundred from the 

 swamp areas near Delair and toward the river. Mr. Viereck found the species 

 along the Big Timber Creek region and in the marsh areas south of Camden. 

 He also found it in the Cape May inland swamp region. This is, therefore, 

 essentially a swamp species, but it does not occur in deep or dark swampu. Mr. 

 Brakeley never found it in the huckleberry swamps of Lahaway and indeed 

 rarely sent in the species in any stage, nor did I find it in my cranberry swamp 

 collections. 



" By far the greater number of larvae were taken in permanent water areas, 

 but many of the woodland pools in which it occurred were temporary in the 

 sense that they usually dried out before the summer was over. It was never 

 sent in from gutters or lot rain pools or from foul waters at any time. Mr. 

 Viereck found it once in a barrel at Cold Spring, Cape May County. In New 

 Brunswick a brood was found in a lot pool August 12th, larvae being mature and 

 pupae already present; a second brood was found September 23d in a similar 

 stage and there may have been a brood in the interval. This is a low springy 

 place, which rarely dries out entirely and which fills readily with even a light 

 rain. The latest collections of larvae were made during the early days of 

 October, adults emerging about the middle of the month." 



Knab, in western Massachusetts, found that the species was most in evidence 

 late in the summer and in early autumn. He found no larvas early in the spring 

 and his earliest adults bear the date of June 28. His captures show that the 

 species was present in some numbers in July and most abundant in September. 



The adult females frequent the woods, where they are more or less trouble- 

 some all the season, but they are not particularly aggressive and do not enter 

 houses to any extent. Both sexes have been observed by Dr. Graenicher visiting 

 flowers in numbers to feed on the honey. Prof. Smith remarks "that they get 

 indoors quite readily but only through large openings, and they will not crawl 

 through screens or crevices. The species is abundant and has an unusually 

 wide distribution. 



North America from Canada to northern Mexico. 



Younghall, New Brunswick, July 4, 1908 (A. Gibson) ; Ottawa, Ontario, 

 June 18, 1906 (J. Fletcher) ; White River, Ontario, June 24, 1907 (F. Knab) ; 

 Minneapolis, Minnesota, July 22 (T. Pergande) ; Euclid, Minnesota, August 27 

 (R. P. Currie) ; Aweme, Manitoba, June 25, July 19, 1907 (N. Criddle) ; Win- 

 nipeg, Manitoba, June 22, 1907 (F. Knab) ; Portal, North Dakota (A. N. Cau- 

 dell) ; Brookings, South Dakota (J. M. Aldrich) ; Mitchell, South Dakota, 

 October, 1902 (E. L. Fullmer) ; Dillon, Montana, August 4, 1908 (R. A. 

 Cooley) ; Moose Jaw, Saskatchewan, August 24, 1906 (Dyar and Caudell) ; 

 Kaslo, British Columbia, June and July, 1903 (H. G. Dyar) ; Ainsworth, Brit- 



