148 



U. S. NATIONAL MUSEUM BULLETIN 216 



FART 8 



Figures 64-66.- 



-Localities: 64 (left), Ischnus inguisitorius assimilis; 65 (center), /. i. 

 pectoralis; 66 (right), /. i. atriceps. 



Calgary, Alta.; August 18 on the South Fork of Eagle Creek, 8,000 ft., 

 White Mountains, N. Mex.; and August 19 at Lower Post, B. C. 

 Females have been collected mostly in June, July, and early August. 

 Their earliest and latest dates are : May 5 at Saskatoon, Sask. ; June 7 

 at Mile 315 on the Richardson Highway, Alaska; June 8 at Sylvan 

 Lake, B.C.; June 8 and 12 at Fort Nelson, B.C.; August 6 at Steam- 

 boat Springs, Colo. ; and August 9 and 24 at Grand Lake, Colo. There 

 is some evidence here of a single generation per year with overwintering 

 as an adult female. The record of a male on June 5 near Whitehorse, 

 Yukon, however, implies that overwintering is sometimes also as 

 males or in an immature state. 



Reared specimens are as follows: 9, from Choristoneura confiictana, 

 Pierceland, Sask., July 17, 1951. 9, from Choristoneura confiictana, 

 Glaslyn, Sask., July 24, 1952. 9, from C%oristoneura confiictana, 

 Oakshela, Sask., June 24, 1952. 9, from "cocoon of aspen leaf," Fort 

 Smith, N. W. T., July 9, 1950, J. B. Wallis. 9, from cocoon tying 

 terminal leaves of Salix, Fort Smith, N. W. T., July 14, 1950, J. B. 

 Wallis. 



This subspecies ranges through the Transition and Canadian zones 

 of the Rocky Mountain area, and eastward in the Canadian zone as 

 far as central Ontario. 



5e. Ischnus inquisitoriiis atriceps (Cresson) 



30, p. 



Cryptus atriceps Cresson, 1878, Proc. Acad. Nat. Sci. Philadelphia, vol. 



361; ? . Type: ? , Great Salt Lake, Utah (Philadelphia). 

 Erythrocryptus rufus Cameron, 1903, Invert. Pacifica, vol. 1, p. 126; 9. Type: 



9 , Claremont, Calif. (London) . 

 Gambrus venablesi Viereck, 1924, Canadian Ent., vol. 56, p. 65; 9- Type: 9, 



Vernon, B. C. (Ottawa). 



