The Mosquitoes of Canada 83 



Mansonia (Coquillettidia) perturbans Walker. 



Culex perturbans Walker, Ins. Saund., Dipt., 428, 1856. 



Ctdex ochropus Dyar & Knab, Journ. N.Y. Ent. Soc., xv, 100, 1907. 



A rather large mosquito with scaly wings and conspicuously ringed 

 legs. Proboscis with many pale scales in the middle, the base and tip 

 dark. Mesonotum with rather coarse pale golden scales, imperfectly 

 covering the surface. Abdomen brown, with a few pale scales at the 

 bases of the segments, and triangular whitish spots at the sides; venter 

 pale scaled, with blackish ones toward the apices of the segments. Legs, 

 dark, with pale scales intermixed, the femora and tibiae pale beneath 

 the hind tibiae with a pale ring at outer third; tarsi with broad white 

 rings at the bases of the joints, the first joint also with a white ring in the 

 middle. Wings with the scales dense and rather broad, brown with white 

 ones intermixed. 



The larvae are attached to the roots of a species of Carex growing in 

 marshes or the edges of ponds. The winter is passed as half-grown 

 larva. The adults fly several miles from the breeding grounds, and are 

 severe biters. They have been known to descend uruused chimneys to 

 get into dwellings which were otherwise screened. 



Distribution: North America, Florida to Canada, westward in 

 timbered country to British Columbia. 



Canadian Records. 



Sand HIill, Rddeau, Ontario, July i, 1906 (J. Fletcher). 

 Kingston, Ontario, June 21, 19 17 (A. B. Klugh). 

 Kenora, Ontario, July 2, 1918 (H. G. Dyar). 

 Dryden, Ontario, June 30, 19 18 (H. G. Dyar). 

 Jordan, Ontario, July 27, 19 16 (E, Hearle). 

 Aweme, Manitoba, Jun^e 30, 1906 (N. Criddle). 

 Kalso, British Columbia, July 2, 1903 (R. P. Currie). 

 Vancouver, British Columbia, August 22, 19 19 (E. Hearle). 

 Hatzie, British Cbli?mbia, July 22, 19 19 (E. Hearle). 



Genus Psorophora Robineau-Desvoidy, 



A gen,us of tropical American origin, developed as an extreme special- 

 ization of the Aedes type,. A number of species occur in the southern 

 United States, some of them strayin'g into southern Ontario. 



The genus contains two subgenera, which divide by genitalic charac- 

 ters as follows: 



Clasp filament furcate or angled; harpago with setae evenly over the 

 bulbous tip Psorophora Robineauj-Diesvoidy 



