362 U. S. NATIONAL MUSEUM BULLETIN 216 part 3 



part forming a lamella that is about 1.0 as high as width of segment 3 

 of maxillary palpus; second segment of flagellum about 2.8 as long 

 as wide in male, about 4.25 as long as wide in female; thorax moder- 

 ately long; horizontal portion of epomia unusually strong, the vertical 

 portion weak or absent; notaulus absent or indistinct; punctures on 

 mesopleurum rather coarse, separated by about 0.5 their diameter; 

 propodeum of moderate length, the sublateral portion of its apical 

 carina forming a broad, moderately strong crest, which is slanted 

 somewhat forward; median portion of apical carina absent or very 

 weak; sides of areolet somewhat convergent, or sometimes parallel; 

 nervulus beyond basal vein by about 0.19 its length; nervellus broken 

 near its middle; petiole rather long, its dorsolateral and ventrolateral 

 angles moderately strong in male, weak in female, its lateral face 

 with some weak longitudinal wrinkling in male, almost smooth in 

 female; second tergite polished or subpolished, its hair sockets sepa- 

 rated by about 0.8 the length of the hairs; ovipositor normal for the 

 genus. 



Male : Black. Maxillary palpus white, its first segment dark brown 

 and last segment light brown ; labial palpus brown ; scape rarely with 

 a white spot in front; tegula dark brown to black; trochanters reddish 

 brown to blackish brown, the front first trochanter usually with a 

 white stripe in front; front femur stramineous in front and apically, 

 the rest dark brown; middle femur blackish brown, its apex and a 

 narrow stripe in front stramineous; front and middle tibiae white, 

 stramineous below; front and middle tarsi white, their fifth segments 

 entirely brown or brown with the base whitish; base of hind tibia 

 brown to stramineous, usually with a short pale stripe on upper side; 

 hind tarsus white, the basal to 0.3 of its basitarsus and apical 0.4 ± 

 of its fifth segment brown; wings subhyaline; abdomen entirely 

 ferruginous or the petiole sometimes infuscate or black. 



Female: Black. Clypeus and scutellum sometimes tinged with 

 ferruginous; palpi fuscous; flagellum usually with a median dorsal 

 white mark that covers about three segments; tegula dark brown; 

 front and middle femora and tibiae dark brown, the front femur and 

 tibia pale brown in front, the middle femur and tibia medium brown 

 in front; front and middle tarsi brown, their fifth segments darker; 

 hind tarsus dark brown or fuscous, the middle three segments often 

 somewhat paler or whitish; wings subhyaline; abdomen ferruginous. 



The male of this species is recognizable by the front and middle 

 tibiae white above, hind basitarsus mostly white, hind femur blackish, 

 and temple flat or weakly concave. The female is distinguished by 

 a more complex group of characters, as described in the key. 



Specimens (93 cT, 479): From Arkansas (Baldwin); Connecticut 

 (Hamden and South Windsor); District of Columbia (Anacostia and 



