112 U. S. NATIONAL MUSEUM BULLETIN 216 



Ont.; May 15 in Midland Co., Mich.; August 1 at Mount Washington, 

 N. H., and at Cornwall, Idaho; August 5 at Vancouver, B. C; August 

 10 at 1,600 ft. at Mt. McKinley, Alaska, and at 1,500 ft. at Mount 

 Lyall, Que.; August 12 at Banff, Alta.; and August 15 at Yoho Park, 

 B. C. 



This species is transcontinental in the Hudsonian and Canadian 

 zones, and in the cooler part of the Transition zone. Adults occur 

 mostly from the middle of May to late June. 



2. Triclistus brunnipes (Cresson) 



Figure 187,b 



Exochus brunnipes Cresson, 1878, Proc. Acad. Nat. Sci. Philadelphia, (1878), 

 p. 374; ? . Type: ? , Nevada (Philadelphia). 



Front wing 4.5 to 6.5 mm. long; face distinctly mat, with coarse 

 punctures that are separated by about 0.4 their diameter; temple of 

 male moderately convex, with moderately dense hairs; temple of 

 female almost flat, with moderately dense hairs; metapleurum with 

 5 to 25 hairs in male, with to 10 hairs in female; median carinae 

 of propodeum sharp but rather weak; areola rather narrow, confluent 

 with basal area, about 1.8 as wide as basal area; costula reduced to a 

 short stub on lateral longitudinal carina; hairs in area of second 

 lateral area of propodeum moderately dense; areolet present, or some- 

 times absent; hind spur of hind tibia about 4.7 as long as wide; second 

 segment of hind tarsus about 2.1 as long as wide in male, about 

 1.9 as long as wide in female; first tergite about 1.25 as long as wide 

 in male, about 1.35 as long as wide in female, its dorsal carinae extend- 

 ing about 0.55 its length; last segment of hind tarsus of female without 

 a subapical, ventral flange, spine, or tuft of hairs on inner side; apical 

 part of subgenital plate of female in side view unusually convex, its 

 median apical notch about 0.15 as deep as wide. 



Black. Palpi brown; tegula black to ferruginous; coxae black; 

 trochanters ferruginous to black; legs beyond femora ferruginous or 

 sometimes brownish ferruginous, the tarsi a little infuscate and 

 femora (especially front femur) often blackish basally. 



Specimens (106 cf, 299): From Arizona (near Alpine); British 

 Columbia (Steelhead, Wigwam Inn on Burrard Inlet, and Victoria); 

 California (Alta Meadow at 9,000 ft. in Sequoia National Park, 

 "Angora Peak" at 8,625 ft., Blanco's Corral at 10,000 ft. in the White 

 Mts. of Mono Co., Echo Lake in Eldorado Co., near Glacier Point in 

 Yosemite National Park, Gold Lake in Sierra Co., Kings River 

 Canyon in Fresno Co., May Lake at 10,500 ft. in Yosemite National 

 Park, White Chief near Mineralking at 9,000 ft., Snow Flat at 8,700 

 ft. in Yosemite National Park, near Sonora Pass at 8,500 ft., and 

 Upper Echo Lake at 7,400 ft.); Colorado (Cascade Lodge in Rocky 



