364 



U. S. NATIONAL MUSEUM BULLETIN 216 



PART 3 



Figures 198, 199.— Localities: 198 (left), Trychosis exulans; 199 (right), T. kathrynae. 



length, its apical carina forming rudimentary siiblateral crests, mesad 

 of the crests curving gently forward, its median portion usually absent; 

 hind femur about 5.6 as long as deep in male, about 4.85 as long as 

 deep in female; hind tarsus of female exceptionally stout, its spinelike 

 bristles unusually conspicuous; sides of areolet faintly to distinctly 

 convergent; nervulus beyond basal vein by about 0.18 its length; 

 nervellus broken near its middle; petiole rather smooth and rounded 

 except that its lateral face is flattened or weakly concave; second 

 tergite subpolished, its hair sockets separated by about 0.8 the length 

 of the hairs; ovipositor normal for the genus. 



Male: Black. Palpi dark brown, the last three segments of maxil- 

 lary palpus pale brown and the apex of segment 2 and most or all of 

 segments 3 and 4 usually whitish or stramineous; second trochanters 

 mostly brown ; front femur pale brown, dark brown basally and behind ; 

 middle femur dark brown, its apex and a stripe in front pale brown; 

 front and middle tibiae fulvous; front and middle tarsi pale fulvous, 

 their fifth segments brown, and median three segments of middle 

 tarsus usually more or less whitish; base and apex of hind femur 

 narrowly ferruginous; segment 1 of hind tarsus dark brown, its apical 

 to 0.8 white, usually its apical 0.65 ± white; segments 2-4 of hind 

 tarsus white; segment 5 of hind tarsus brown, often white basally; 

 wings faintly tinged with fuscous; apical 0.35 ± of first tergite and all 

 of tergites 2-5 ferruginous, the apex of tergite 5 sometimes infuscate. 



Female: Black. Palpi fuscous; flagellum blackish brown, the apex 

 of the basal segments a little paler, the flagellum nearly always with 

 a median incomplete whitish band that covers about 4 segments; 

 front and middle femora dark brown, their apices paler; front and 

 middle tibiae and tarsi medium brown, the fifth segments of their 



