INSECUTOR INSCITI^ MENSTRUUS 21 



Yukon Territory, July 13, 1919 ; Dawson, Yukon Territory, 

 July 18, 1919. 



Also Calgary, Alberta, April 14, 1913 (N. Criddle), from 

 the collection of Dr. C. Gordon Hewitt. 



This species extends also well down the Yukon. Dr. Lud- 

 low's types came from Eagle, Alaska, and I have, through the 

 U. S. Biological Survey, specimens from Beaver Mountains, 

 Alaska, May 15, 28, 1917 (A. H. Twitchell). 



Anopheles occidentalis Dyar & Knab. 



A specimen was taken on the deck of the steamship Dawson 

 on the Yukon River while making a landing. 



Total, 1 specimen : Hootalinqua, Yukon Territory, July 6, 

 1919. 



Also Aweme, Manitoba, April 16, 1915 (N. Criddle), from 

 the collection of Dr. C. Gordon Hewitt. 



n. Pacific Coast Fauna 



The moist winds from the Pacific, striking the high coastal 

 mountains, produce an almost continual rain, from which pe- 

 culiar conditions have evolved. The ground is a mass of peet, 

 roots and moss, designated as muskeg, which retains water for 

 a considerable time. In the spring, flat, shallow, sharp-edged 

 pools are frequent, not in the bottoms of valleys or even in 

 depressions, but right on exposed tops or sides of hills. Some 

 of these pools remain more or less full all summer and all 

 leave permanent beds from which grass is absent. Plate I, 

 figure 1, shows Ketchikan, Alaska, as seen from tide water, 

 the high mountains in the back being entirely obscured by the 

 small hills in the foreground, but the precipitous nature of the 

 coast is evident, the town being perched on a steep hillside. 

 Figure 3 is a view of Kaien Island from the hill across the bay, 

 the scattering town at the base of the hill being Prince Rupert, 

 British Columbia. The water at the right is the estuary of the 

 Skeena River. Figure 2 is a view looking down from the 

 center of Prince Rupert from the spot marked with an arrow 

 in figure 3. This place looks level, but is in reality a high hill 



