370 



U. S. NATIONAL MUSEUM BULLETIN 216 



PART 3 



Figures 200-202.— Localities: 200 (left), Trychosis subgracilis; 201 (center), T. depilis; 



202 (right), T. atroruhens. 



their diameter; propodeum of moderate length, its apical carina 

 forming broad rudimentary sublateral crests, mesad of the crests 

 curved forward, its median portion very weak or sometimes absent; 

 hind femur of male about 5.9 as long as deep, of female about 5.6 as 

 long as deep; sides of areolet parallel or faintly convergent; nervulus 

 beyond basal vein by about 0.33 its length; nervellus broken near its 

 middle; petiole rather slender, with a ventrolateral and dorsolateral 

 longitudinal ridge, its lateral face mth some weak wrinlding; second 

 tergite subpolished, its hairs a little denser laterally than medially, 

 the hair sockets separated b}^ about 0.8 the length of the hairs in male, 

 m female the sockets almost as closely spaced but because the hairs 

 are shorter they are separated by about 1.0 to 1.4 the length of the 

 hairs; ovipositor normal for the genus. 



Male: Black. Palpi blackish brown; tegula black; front femur 

 light brown, fuscous basally and behind; middle femur blacldsh, its 

 front side rather light brown, at least toward the apex; front and mid- 

 dle tibiae dark brown, medium brown in front; front and middle tarsi 

 dark brown, paler at the joints; hind tarsus black, most or all of 

 segments 3 and 4 usually white, and some or all of segment 2 often 

 white; wings infuscate; apical 0.18 of first abdominal segment and all 

 of the following segments ferruginous. 



Female: Colored like the male except that hind tarsus is always 

 blackish brown with the joints paler. The fiagellum is entirely 

 black. 



The fuscous wings, black hind femur, vertical part of epomia weak or 

 absent, fiat or wealdy convex temple, and very high, lamellalike 

 occipital carina distinguish this species. It is very close to T. rejlexa, 

 which is most easily distinguished by the strong vertical portion of 

 the epomia. 



