504 



U. S. NATIONAL MUSEUM BULLETIN 216 



fuscous at apex ; hind leg fuscous or inf uscate, its coxa and trochanters 

 fulvous. 



Specimens: 9 (type of yukonensis) , Fort Yukon, Alaska, L. M. Turner 

 (Washington). 9, Rampart, Alaska, June 28, 1903, M. E. Koonce 

 (Pittsburgh). 9, Sidney, B. C, May 21, 1927, W. H. A. Preice 

 (Washington), cf, Campus of University of Colorado, Boulder, 

 Colo., June, T. D. A. Cockerell (Washington). 9, Longs Peak Inn 

 at 9,000 ft., Colo., July 2, 1926, E. C. Van Dyke (San Francisco). 

 9 (type of frigidus), "Hudson Bay territory" (Philadelphia). 9, 

 Lake Waha, Idaho, June 22, 1927, J. M. Aldrich (Washington). 9, 

 Meddybemps, Maine, July 28, 1922, M. Band and R. J. Sim (Townes). 

 d\ "Kelly's Camp," Gaspe Peninsula, Que., Aug. 21, 1931, W. A. 

 Ruko (Ottawa). 9, Montreal, Que., July 4, C. J. Ouellet (Ithaca). 

 9, Montreal, Que. (Ithaca). 9, Montreal, Que., Ouellet (Ottawa). 

 9, Que., July 24, 1944 (Ottawa). 9, St. Pascal, Que., August 1942, 

 O. Richard (Ottawa), cf, 9, Sherbrooke, Que., Sept. 23, 1895 

 (Washington), d 1 , 9, Val Morin, Que., July 28, 1902, and August 

 14 (Ithaca). 9, Val Morin, Que., August 2, C. J. Ouellet (Ithaca). 

 9, Val Morin, Que., July 28, 1902 (Townes). 9, Rutland, Vt., Aug. 

 1-15, 1916, Chittenden (Washington). 9, Sullivan Lake, Pend 

 Oreille Co., Wash., June 4, 1931, W. O. Scott (Ann Arbor). 9, 

 Carcross, Y. T., July 28, 1919, A. P. Hawes (Ottawa). 



This species is transcontinental in the Canadian zone. 



Figures 230, 231. — Localities: 230 (left), Xorides frigidxis; 231 (right), X. piclus. 



II. RILEYI GROUP 



Body stout to moderately slender; occipital carina complete; temple 

 punctate and sometimes more or less obliquely rugulose (figs. 

 316,a,b,c); tooth at upper end of epomia moderately strong; areola 

 pentagonal with its posterior side wide; median longitudinal carinae 

 usually fused basad of areola (figs. 314,g,h) ; a broadly triangular tooth 



