The Mosquitoes of Canada 91 



Hpotalinqua, Yukon Territory, July 15, 19 19 (H. G. Dyar). 

 Tantalus Mine, Yukon Territory, July 6, 19 19 (H. G. Dyar). 

 Big Salmon, Yukon Territory, July 15, 19 19 (H. G. Dyar), 

 Carmack's, Yukon Territory, July 14, 19 19 (H. G. Dyar), 

 Dawson, Yukon Territory, July 7, 19 19 (H, G. Dyar). 



Aedes (Heteronycha) intrudens Dyar, 



Aedes intrudens Dyar, Ins. Ins, Mens., vii, 23, 1919. 



A medium sized, black mosquito, very fond of entering houses. Head 

 with brown scales on the vertex, a narrow line of black ones on each side, 

 and a patch of creamy ones below. Mesonotum with dark bronzy brown 

 scales, the posterior lateral stripes often showing faintly blackish, with a 

 slender light line within. Abdomen black, with basal segmental white 

 bands, generally not contracted in the middle; venter whitish scaled. 

 ly.egs black, the femora pale beneath. Wing-scales dark. 



Liable to be confused with the ahserratus form of punctor or the 

 heavily suffused form of prodotes, the male genitalia abundantly diag- 

 nostic in both cases. Also similar to the unlined form of lazarensis; but 

 that has always a pale margin to the mesonotum, lacking in intrudens. 



The winter is passed in the egg state. The larvae develop in early 

 ground-pools in spring, this being one of the especially early species. 

 The adults are short-lived, disappearing comparatively early in the 

 season. This is the most troublesome of the forest mosquitoes, from its 

 habit of entering houses. Wjhen large numbers get in, as often happens, 

 sleep IS difificult. No other forest species behaves in this manner. 



The mating habits of the males have not been observed. 



Distribution: Northern forest?, Atlantic to Pacific. 



Canadian Records. 



Chats Rapids, Quebec, May 24, 1900 (J. Fletcher). 



White River, Ontario, June 24, 1907 (F. Knab). 



Nipigon, Ontario, June 26, 1918 (H. G. Dyar). 



Dryden, Ontario, June 29, 1918 (H. G. Dyar). 



Winnipeg Beach, Manitoba, July 5, 1918 (H. G. Dyar). 



Lake Minnewanka, Alberta, July 22, 1918 (H. G. Dyar). 



Banff, Alberta, July 7, 1918 (H. G. Dyar). 



Laggan, Alberta, July 11, 1918 (H, G. Dyar). 



Terrace, British Columbia, August 12, 1919 (H. G. Dyar). 



Salvus, British Columbia, June 3, 19 19 (H. G. Dyar). 



Kwinitsa, British Columbia, May 22, August 14, 1919 (H. G. Dyar). 



