ICHNEUMON-FLIES OF AMERICA! 1. METOPIINAE 221 



Figures 131, 132. — Localities: 131 (left), Exochus tenebrosus; 132 (right), E. albifrons. 



arated from eye by about 1.0 its long diameter in male, by about 

 1.3 its long diameter in female; costula strong and complete; second 

 lateral area of propodeum about 1.7 as long as wide, with a few hairs 

 apicolaterally; hind femur about 2.52 as long as deep in male, about 

 2.22 as long as deep in female; front spur of hind tibia about 3.2 as 

 long as wide in male, about 3.5 as long as wide in female; punctures 

 on second tergite moderately small, not particularly sharp, sublaterally 

 separated from each other by about 1.5 their diameter, medially very 

 sparse; male clasper moderately wide, its apex elliptically rounded. 



Black. Interantennal process of frons in male often margined with 

 stramineous; usually a small brown spot at top of eye; palpi and tegula 

 dark brown; legs blackish or very dark brown. 



Type: 9, Phantom Valley, Rocky Mountain National Park, at 

 9,400 ft., Colo., Aug. 10, 1948, H., M., D., and J. Townes (Washington, 

 USNM 63659). 



Paratypes: cf, 9, Phantom Valley, Rocky Mountain National 

 Park, at 9,400 ft., Colo., Aug. 9 and 10, 1948, H., M., D., and J. Townes 

 (Townes). 10 6% 19, Poudre Lake, Rocky Mountain National Park, 

 at 11,000 ft. and at 11,600 ft., Colo., Aug. 10, 11, and 12, 1948, H., 

 M., G., D., and J. Townes (Townes). 2d 1 , Rabbit Ears Pass at 9,500 

 ft., Colo., Aug. 7, 1948, H., M., G., and D. Townes (Townes). d\ 

 Mount Rainier at 4,700 ft., Wash., July 11, 1940, H. and M. Townes 

 (Townes). 2cf, Dunraven Pass, Yellowstone Park, Wyo., Jul. 28, 

 1934, A. L. Melander (Cambridge). 



We found the species in Colorado common among a low red-berried 

 Vaccinium growing under evergreens. It was only there, and never 

 in the open. 



This species occurs on the undergrowth of forests a little below 

 timberline, in Washington, Wyoming, and Colorado. Adults have 

 been taken from July 11 to August 12. 



