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U. S. NATIONAL MUSEUM BULLETIN 216 



PART 3 



7. Metapleurum not wrinkled, with close, adjacent, or partly confluent punc- 

 tures; cheek about 0.75 as long as basal width of mandible. 



7. acadia Cushman 



Metapleurum more or less coarsely wrinkled, also closely punctate; cheek about 



1.05 as long as basal width of mandible 8. rugosa, new species 



1. Diapetimorpha brunnea, new species 



Male: Front wing 3.4 to 4.7 mm. long; clypeus moderately convex; 

 cheek about 0.78 as long as basal width of mandible; tyloids obsoles- 

 cent, showing as weak ridges about 0.35 as long as the segments; 

 metapleurum with fine, very weak punctures, with a rather distinct 

 juxtacoxal carina; intercubitus about 3.5 as long as the width of radial 

 vein. 



Head ferruginous, the face, clypeus, cheek, frontal orbit, and temple 

 except above, white; mandible white; palpi white; scape fulvous; 

 pedicel light brown; flagellum uniformly dark brown; thorax ferrugi- 

 nous, the propleurum, more or less of collar and lower margin of pro- 

 notum, subtegular ridge, and more or less of mesosternum, whitish; 

 front and middle coxae and trochanters white; front and middle femora 

 and tibiae pale fulvous, lighter below, darker above; front tarsus 

 stramineous, brown apically; middle tarsus brown, stramineous at the 

 joints; hind coxa, trochanters, and femur fulvous, the trochanters 

 partly white and the femur with a weak apical infuscation; hind tibia 

 light brown, its base a little paler; hind tarsus infuscate, paler at the 

 joints, segments 2-4 and apex of segment 1 often largely or entirely 

 white; wings faintly infuscate; first tergite ferruginous, its apex whitish 

 and often its median part weakly infuscate; second and following ter- 

 gites ferruginous, their basal 0.4 ± fuscous. 



Female: Front wing 4.2 to 5.7 mm. long; clypeus moderately con- 

 vex; cheek about 0.80 as long as basal width of mandible; metapleurum 

 with strong horizontal wrinkles and interspersed small punctures; 



Figures 207, 208. — Localities: 207 (left), Diapetimorpha brunnea; 208 (right), D. alahama. 



