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U. S. NATIONAL MUSEUM BULLETIN 216 



the rest brown; middle tarsus stramineous, brown apically; hind coxa 

 blackish; hind femur blackish brown, its apex yellow above; hind 

 tibia pale brownish yellow, its basal 0.17 and apical 0.33 dark brown, 

 ventrally its apical 0.55 dark brown; hind basitarsus brownish yellow, 

 brown at apex; second and following segments of hind tarsus missing 

 from type. 



Type: d\ Oakland, Calif., Apr. 30, 1939, E. S. Koss (Washington, 

 USNM 63668). 



38. Exochus signifer, new species 



Figures 179,m; 190,d; 195,a 



Male: See the note under E. transversus "male." 



Female: Front wing 4.6 to 5.2 mm. long; combined face and clypeus 

 about 0.91 as high as wide, rather strongly, evenly convex in vertical 

 plane, moderately convex in horizontal plane, their punctures mod- 

 erately coarse, strong, on face separated by about 0.5 their diameter, 

 on clypeus somewhat sparser; apical angle of interantennal process 

 about 60 degrees; median swelling of frons rather strong and distinct; 

 hind ocellus separated from eye by about 1.00 its long diameter; 

 median half of clypeal margin straight; flagellum with 26 to 28 seg- 

 ments; mandible with moderate-sized scattered punctures, rather 

 long and weakly tapered, its lower tooth small and upper tooth unusu- 

 ally long, costula complete or incomplete; second lateral area of pro- 

 podeum with a very few hairs laterally; hind femur about 2.12 as long 

 as deep; second abdominal tergite impunctate medially, its punctures 

 sublaterally of moderate size, sharp, and separated by about 1.6 

 their diameter. 



Black. Face, orbital line on lower 0.2 to 0.6 of frons, rather large 

 spot at top of eye, clypeus, cheek, adjacent temple, mouth parts, 

 under side of scape, upper margin of pronotum from epomia to apex 



Figure 143. — Localities for 

 Exochus signifer. 



