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U. S. NATIONAL MUSEUM BULLETIN 216 



PAST 3 



Figures 192-194. — Localities: 192 (left), Trychosis semiruhra arizonica; 193 (center), T. 



latidens; 194 (right), T.fuscata. 



Type: 9, Mount Rainier, Wash., 5,300 ft., Aug. 16, 1940, H. and 

 M. Townes (Washington, USNM 63810). 



Paratypes (6cf, 259): From Alberta (Onefour); British Columbia 

 (Fort Nelson and Robson); Colorado (near Estes Park and Peaceful 

 Valley) ; Manitoba (Riding Mountain Park) ; Massachusetts (Hopkin- 

 ton); Michigan (Alston in Houghton Co., Gogebic Co., Gratiot Co., 

 and Yellow Dog Plains in Marquette Co.); Minnesota (Itasca Park); 

 New York (Ithaca); Ontario; Oregon (Grande Ronde in Union Co.); 

 Quebec (Kazabazua) ; Washington (Carbonado and Mount Rainier at 

 4,700, 5,300, and 5,700 ft.); and Yukon Territory (Watson Lake). 



Collection dates are from late May to mid-August. The earliest 

 and latest dates are: May 22 at Hopkinton, Mass. ; May 26 at Robson, 

 B.C.; August 15 and 16 at 5,300 ft. on Mount Rainier, Wash.; and 

 "August" at Peaceful Valley, Colo. 



In our experience the usual habitat is moist meadows among 

 scattered trees. 



This species is transcontinental, mostly in the Canadian zone. 



10. Trychosis fuscata, new species 



Figure 390 



Front wing 5.9 to 6.3 mm. long; clypeus of moderate size, strongly 

 punctate and strongly convex, its apical margin weakly arcuate; 

 mandible rather large; temple moderately convex; cheek of moderate 

 length, very strongly mat and with moderately large, adjacent punc- 

 tures, not distinctly wrinkled; occipital carina strong and sharp but 

 not raised as a lamella; second segment of flagellum 2.3 as long as 

 wide in male, about 3.0 as long as wide in female; thorax rather short 



