The Mosquitoes of Canada 95 



The larvae occur in flood pools shaded by bushes. The adults are 

 often extremely small, so as to pass through window-screens. They 

 inhabit the woods in river-bottoms, not coming out into open country. 

 The adults are voracious biters. 



Distribution: River valleys of the Rocky Mountain watershed, both 

 east and west. 



Canadian Records. 



Mission, British Columbia, August 4, 1919 (E. Hearle). 



Nicomen Island, British Columbia, June 15 to August 3, 1919 (E. Hearle). 



Chilliwack, British Columbia, July 2, 19 19 (E. Hearle). 



Agassiz, British Columbia, July 16, 1919 (E. Hearle). 



Ruskin, Bfitish Columbia, July 23, 1919 (E. H.earle). 



Hope, Bjritish Columbia, August 3, 1919 (E. Hfearle). 



Abbotsford, British Columbia, July 12, 1920 (H. G. Dyar). 



Group Functor. 

 Aedes (H^eteronycha) functor Kirby. 



Culex punctor Kirby, Richardson's Fauna Bor.-Am., iv, 309, 1837. 



Culex implacahilis Walker, List Dipt. Brit. Mus., i, 7, 1848. 



Culex provocans Walker, List Dipt. Brit. Mus.^ i, 7, 1848. 



Culex ahserratus Felt & Young, Science, n.s., xx, 312, 1904. 



Culicelsa auroides Felt, Bull. 79, N.Y. State Mus., 448, 1905, 



Aedes centrotus Howard, Dyar & Knab, Mosq. No. «& Cent. Am. & W. I., 



iv, 747, 1917- 



A rather large blackish mosquito. Mesonotum with dark yellow or 

 gray scales on the sides, a quadrate broad dark brown band in the middle. 

 AjDdomen black, with basal segmental white bands, usually narrow and 

 narrowed centrally; venter white-scaled. Legs black, the femora white 

 below. Wing-scales wholly dark. 



In the east, the mesonotum is commonly suffused with brown, with 

 the dark central band still visible (form centrotus), or entirely dark brown 

 (form abserratus) . The latter is difficult to distinguish from intrudens. 

 \p. the west, the typical form {punctor = auroides) predominates, suffused 

 examples being rare. Here the sides of the mesonotum are as often gray 

 as yellow; in the east, always yellow. Another variation which occurs 

 throughout the range, although not abundantly, has the median meso- 

 notal stripe divided, foiming two lines. This is very difficult to dis- 

 tinguish from lazarensis. Both the forms of diantaeus, also, closely 

 resemble corresponding forms of punctor. This is, however, generally a 

 larger and more robust mosquito than diantaeus, the legs less deep black. 



