The Mosquitoes collected by the Canadian Arctic Expedition, 
1913-18. 
(Diptera, CulicidsB.) 
By Harrison G. Dyar. 
Introductlon. 
Many stories are current about the extraordinary abundance of mosquitoes 
in the Arctic regions, rivalling the tropics in this respect. That these stories 
are not overdrawn, is shown by the accompanying photographs, taken in the 
deltas of the Colville and Slave rivers by Dr. R. M. Anderson of the Canadian 
Arctic Expedition. Nevertheless, the number of species present is small in the 
northern regions, though individuals may be abundant. Along the Arctic coast 
of the Northwest Territories, here considered, but two species are identified, 
whereas a collection of an equal number of specimens in the tropics might 
include thirty or forty species. 
Head net, as used in the Noi'th for pro- 
tection against mosquitoes. Delta 
of Slave River, Great Slave lake, 
N.W.T., June, 1908. 
Mosquitoes on back of man's hooded coat. 
Near Nigalik, delta of Colville river. 
Arctic coast of Alaska. July 3, 
1909. 
The collection before me was made during the years 1913, 1914, 1915, and 
1916; but it is disappointingly a small one (134 specimens), and the material is 
in very poor condition. The region, however, is interesting, embracing the 
Arctic coast of Alaska and the Canadian Northwest Territories. 
