176 U. S. NATIONAL MUSEUM BULLETIN 216 



Hind tibia with approximately its basal 0.15 and apical 0.63 blackish (fig. 

 194,g); clypeus white with its apical edge blackish. 



35. cncmidotus, new species 



34. Front spur of hind tibia 3.0 to 3.8 as long as wide 35 



Front spur of hind tibia 1.8 to 2.7 as long as wide 40 



35. Hind coxa and femur ivory white; hind tibia white, black at base, sometimes 



rather narrowly blackish at apex (fig. 194,e) . . 33. genualis, new species 



Hind coxa and femur fulvous, the femur usually fulvous at apex; hind tibia 



white, blackish at base and broadly blackish at apex (figs. 194, a-d) . 36 



36. Frons next to eye white for its entire height; hind ocellus separated from eye 



by 0.2 to 0.5 its long diameter; median longitudinal carinae of propodeum 



weak 37 



Frons next to eye partly or entirely black; hind ocellus separated from eye 

 by 0.6 to 1.1 its long diameter; median longitudinal carinae of propodeum 

 strong 38 



37. Frons black medially, white laterally; hind ocellus of female separated from 



eye by about 0.45 its long diameter; ground color of thorax blackish, though 

 fulvous markings are very extensive .... 30. virgatifrons, new species 

 Frons entirely white except for a median ventral pair of small spots and an 

 area enclosing ocelli; hind ocellus of female separated from eye by about 

 0.25 its long diameter; ground color of thorax fulvous. 



31. ferrugineus (Ashmead) 



38. Metapleurum entirely black, or if partly fulvous then the mesoscutum is also 



fulvous; front wing 3.8 to 4.9 mm. long; punctures on second abdominal 

 tergite small, the sublateral ones separated by about twice their diameter. 



32. mesorufus, new species 

 Metapleurum entirely fulvous, or if only partly fulvous then the mesoscutum 



is entirely black; front wing 4.9 to 7.5 mm. long; punctures on second 

 abdominal tergite of moderate size, the sublateral ones separated by about 

 1.3 to 1.7 their diameter 39 



39. Combined face and clypeus about 1.36 as high as wide; clypeus of female 



as convex as the face 27. rutilatus, new species 



Combined face and clypeus about 1.02 as high as wide; clypeus of female 

 somewhat flattened, distinctly less convex than the face. 



29. brutus, new species 



40. Basal dark area of hind tibia 0.40 to 0.45 as long as apical dark area (as 



measured on dorsal edge of tibia; figs. 195,a,b) ; apical angle of interantennal 

 process of face 55° to 75°; hind femur without a whitish area at apex or 



with a small indistinct whitish area (figs. 195, a,b) 41 



Basal dark area of hind tibia 0.50 to 0.75 as long as apical dark area (as 

 measured on dorsal edge of tibia; figs. 194,i; 195,c-e) ; apical angle of inter- 

 antennal process of face 85° to 120°; hind femur with a distinct whitish 

 area at apex, except in some specimens of E. spilolus 42 



41. Female: Upper margin of pronotum pale yellow from hind corner to epomia; 



face and clypeus pale yellow, the face usually with a large median blackish 

 triangle or sometimes more extensively black, the clypeus always pale 

 yellow; flagellum with 26 to 28 segments. ... 38. signifer, new species 

 Female: upper margin of pronotum pale yellow only at hind corner; face and 

 clypeus black, the upper edge of face with a transverse pale yellow band 

 (fig. 179,n); flagellum with about 21 segments. 



39. transversus, new species 



