520 



U. S. NATIONAL MUSEXJM BULLETIN 216 



PART 3 



Figures 303-305. — Localities: 303 (left), Helcostizus albator yukonensis; 304 (center), 

 H. a. rufiscutum; 305 (right), H. a. canadensis. 



front and middle legs fulvous, their tarsi brown apically; hind coxa, 

 trochanters, and femiu" fulvous, the apical 0.2 ± of femur infuscate 

 except that its extreme apex is stramineous ; hind tibia and tarsus 

 uniformly dark brown. 



The male listed below from Edmonton, Alta., is a little intermediate 

 to the subspecies canadensis. We have many intermediates to the 

 subspecies rufiscutum. These are listed in the last paragraph under 

 the specific heading. 



Specimens: cf , Anchorge, Alaska, June 24, 1951, K. S. Bigelow 

 (Ottawa). cT, Fairbanks, Alaska, July 3, 1921, J. M. Aldrich (Wash- 

 ington), cf (paratype), Fort Yukon, Alaska, 1877, L. M. Turner 

 (Washington), cf , 29, Gulkana River, Alaska, 1955, G. Schumann 

 (Washington). 9, Mount McKinley at 1,600 ft., Alaska, Aug. 8, 

 1954, D. Townes (Townes). 9, Mount McKinley National Park, 

 Alaska, 1932, F. W. Morand (Washington), cf , 29, Edmonton, Alta., 

 Aug. 19, 1923, E. H. Strickland (Townes). 9, Craig Mts., Idaho, 

 June 8, 1918, A. L. Melander (Cambridge). 9, Reindeer Depot, 

 Mackenzie Delta, N.W.T., July 17, 1948, W. J. Brown (Ottawa). 

 9, Santiam "National Forest," Oreg., Aug. 27, 1914, W. J. Cham- 

 berUn (Cambridge). 9, MetaUne Falls, Wash., June 7, 1931, D. 

 DeLeon (Washington). 



This subspecies ranges from Alaska to Oregon and Idaho. 



5c. Helcostizus albator rufiscutum Cushman, new status 



Helcostizus rufiscutum Cushman, 1919, Proc. U.S. Nat. Mus., vol. 55 p. 533; 9. 

 Type: 9, Cypress Point, Monterey, Calif. (Washington). 



Tyloids of male antenna occurring on about 5 segments, in the shape 

 of low rounded ridges that are obliquely longitudinal in position. 



