254 



U. S. NATIONAL MUSEUM BULLETIN 216 



Specimens: 9, Pyriton, Ala., H. H. Smith (Washington), d", 

 Edmonton, Alta., July 5, 1947, E. H. Strickland (Edmonton), cf 

 (type) District of Columbia (Philadelphia), c?, 9, Takoma Park, Md., 

 July 4 and 5, 1942, H. and M. Townes (Townes). 29, Takoma Park, 

 Md., July 1, 1943 and Aug. 23, 1943, H. and M. Townes (Townes). 

 9, Chisago Co., Minn., July 15, 1911 (St. Paul). 9, Glassboro, N. J., 

 Aug. 12, 1942, W. F. Rapp, Jr. (Washington). 9, in grass bog, McLean 

 Reserve, Tompkins Co., N. Y., Sept. 12, 1914 (Ithaca). <?, Pough- 

 keepsie, N. Y., Aug. 2, 1936, H. Townes (Townes). 9, Chatterton, 

 Ont., July 22, 1951, John C. Martin (Ottawa). 9, Swiftwater, Pa., 

 Aug. 12, 1939, T. R. Gardner (Townes). 9, J. C. Bridwell (Washing- 

 ton). 



This species occurs from New York to Alabama and westward to 

 Alberta. 



47. Exochus quadradens, new species 



Figures 190,m; 196,a 



Male: Unknown. 



Female: Front wing 4.0 to 4.3 mm. long; combined face and clypeus 

 about 1.19 as high as wide, their convexity uniform, moderately 

 strong; apical angle of interantennal process about 115 degrees; 

 median 0.5 of clypeal margin faintly concave; median area of frons 

 very weakly raised and very weakly differentiated; mandible mod- 

 erately large, not twisted, rather broadly rectangular, only very little 

 narrowed from its condyles to the base of its teeth, its outer face 

 moderately punctate, its lower tooth very broad and short, its upper 

 tooth moderately long; second lateral area of propodeum with a few 

 hairs in apicolateral corner; front spur of hind tibia about 2.5 as long 

 as wide; punctures of second tergite moderately small, sharp, very 

 sparse or absent medially, the sublateral ones separated by about 1.5 

 their diameter. 



5S 



Figures 153, 154. — Localities: 153 (left), Exochus quadradens; 154 (right), E. cuneatus. 



