246 U. S. NATIONAL MUSEUM BULLETIN 216 



lowish on basal half, infuscate fulvous on apical half, more uniformly 

 fulvous beneath; hind tibia white, its basal 0.20 ± and apical 0.27 ± 

 (as measured on upper edge), blackish, on the front face the apical 

 black mark 0.40 ± the tibial length; hind tarsus white, the apical 0.75 

 of the last segment blackish. 



Type: 9, Ashford, Wash., Aug. 18, 1940, H. and M. Townes (Wash- 

 ington, USNM 63671). 



Paratypes: 9, Northeast Harbor, Maine, Aug. 11, 1909, C. S. 

 Minot (Washington). 9, reared from tortricid, Fort William, Ont., 

 1945 (Ottawa). 9, Westport, Wash., July 17, 1940, H. and M. 

 Townes (Townes). 



This species is known from Maine, Ontario, and Washington. 



42. Exochus dorsalis Cresson 



Figure 190,h 



Front wing 3.8 to 6.0 mm. long; combined face and clypeus about 

 1.04 as high as wide in male, about 1.02 as high as wide in female, its 

 upper part moderately convex, just above the middle strongly convex, 

 below this point more or less flattened, in the female discally almost 

 or quite flat or discally concave; punctures of face and clypeus coarse, 

 on face subadjacent, on clypeus abruptly very much sparser; apical 

 angle of interantennal process about 105 degrees; median swelling 

 of frons very strong and very strongly delimited; hind ocellus separated 

 from eye by about 0.75 its long diameter in male, by about 0.87 its 

 long diameter in female; median half of clypeal margin weakly con- 

 cave; mandible with scattered, medium sized punctures, moderately 

 wide, tapered toward apex and rather abruptly narrowed near base 

 of teeth, its lower tooth very small; costula absent or incomplete, 

 sometimes complete; second lateral area of propodeum with a few 

 hairs basally and apicolaterally; nervulus distad of basal vein by 

 about 0.4 its length; hind femur from 1.60 to 2.20 as long as wide, 

 according to the sex and subspecies; front spur of hind tibia from 

 about 2.0 to 2.5 as long as wide, according to the sex and subspecies; 

 second tergite with rather small sharp punctures, medially almost 

 or quite impunctate, sublaterally the punctures separated by about 

 2.0 their diameter; male clasper moderately wide, moderately hairy, 

 rather abruptly, obliquely narrowed from below, its apex sharply 

 rounded. 



Black. Face, frontal orbit (wide below, tapered above) almost or 

 quite confluent with spot at top of eye, unusually large spot at top of 

 eye, cheek, lower part of temple, mouth parts, scape below, often 

 pedicel below, upper margin of pronotum (very wide behind, tapered 

 forward to epomia), tegula, subtegular ridge, postscutellum, and 

 broad apex and sides of scutellum, ivory white; black ground color 

 of head sometimes more or less replaced with ferruginous; flagellum 



