ICHNEUMON-FLIES OF AMERICA: 1. METOPIINAE 



57 



with about 36 segments in male, with about 40 segments in female; 

 front spur of middle tibia about 0.34 as long as hind spur in male, 

 about 0.48 as long as hind spur in female; second segment of middle 

 tarsus about 2.05 as long as wide in male, about 1.85 as long as wide 

 in female. 



Both sexes colored as in T. onitis, except that the female mandible 

 is yellow. 



Type: 9, Takoma Park, Md., July 17, 1943, H. and M. Townes 

 (Washington USNM 63611). 



Paratypes: cf, Pierson, Man., July 3, 1927, H. J. Brodie (Ottawa). 

 9, Takoma Park, Md., June 20, 1943, H. and M. Townes (Townes). 

 d\ Rock City in Cattaraugus Co., N. Y., June 9, 1915 (Washington). 

 9, Rocky Mount, N. C, June 21, 1951, H. Townes (Townes). d% 

 Spring Brook, Pa., May 24, 1945, H. Townes (Washington). d\ 

 Black Pond in Fairfax Co., Va., June 19, 1919, William Middleton 

 (Washington). 



This species occurs in the Alleghenian and Carolinian faunas. 



21. Trieces diffidens, new species 



Front wing 3.7 to 4.5 mm. long; face about 1.6 as wide as high; face 

 and clypeus in profile with an unbroken, evenly convex surface, or 

 slightly flattened below; middle half of apical margin of clypeus 

 faintly (most males) to distinctly (females) concave; flagellum with 

 about 33 segments in male, with about 32 segments in female; front 

 spur of middle tibia about 0.36 as long as hind spur; second segment of 

 middle tarsus about 1.5 as long as wide in male, about 1.4 as long as 

 wide in female. 



Both sexes colored as in T. onitis, except that the female mandible 

 is yellow. 



Figures 37, 38. — Localities: 37 (left), Trieces diffidens; 38 (right), 7*. onitis. 



