240 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I25 



long and 1.2 mm. wide; relation of length of body to wing, 1:1; Sc 

 pilose along basal sixth ; Ri pilose and spiny along distal half ; R2+3 

 pilose along distal four-fifths ; Cu2 arcuate ; discal cell absent. 



Legs: Leg i, length, 3.1 mm. ; coxa, trochanter, and femur black; 

 inner face of femur with yellow pruinosity and with appressed, golden- 

 yellow, scalelike hairs ; both extremities of tibia black, the middle re- 

 gion tan, with band of silver pruinosity on outer margin, the latter 

 clothed with several silvery scalelike hairs ; tarsus completely black. 

 Leg 2, length, 2.7 mm. ; completely black except for basal third of 

 tibia which is tan. Leg 3, length, 3.3 mm, ; coxa and trochanter black; 

 femur dark brown, its apical third black; tibia black, with basal tan 

 ring; basal third of basitarsus and of second tarsal segment tan, the 

 remainder of these segments, as well as all of segments 3-5, black; 

 tibia and basitarsus very broad and spindle-shaped ; relation of basi- 

 tarsus to second tarsal segment, 4:1; calcipala well developed, reach- 

 ing pedisulcus ; pedisulcus very well formed on basal fourth of second 

 tarsal segment. 



Abdomen : Tergite and pleurites black ; short black hairs on 

 tergite; long tan hairs, reaching the fourth segment, on pleurites. 

 Segment 2 black, anterior half of tergite and the pleurites white- 

 pruinose. Other segments black ; pleura of segments 5-8 partially 

 white-pruinose ; pleura of segments 2-4 with tuft of long black hairs. 

 Sternites tan. 



Genitalia : Sidepiece (pi. 26, fig. 94) rectangular, with protuber- 

 ance from outer posterior angle ; dorsal opening small, occupying less 

 than half of dorsal surface of sidepiece. Clasper (pi. 26, fig. 94) long 

 and slender, with dorsal expansion on outer margin near base; apex 

 of clasper somewhat broader than its midregion, truncate, with a 

 single, strong terminal spine ; a few very long, stout hairs on distal 

 third of clasper more pronounced than the others. Body of adminicu- 

 lum (pi. 26, fig. 95) wider than long, quadrangular; basal processes 

 long, well sclerotized, ending in points ; extending longitudinally along 

 the midline of the ventral surface of the body of the adminiculum is 

 a raised, keel-like structure which is clothed with fine hairs ; on the 

 dorsal surface the apical half of the adminiculum is doubled over to 

 form a pocketlike flap which is clothed with short hairs. Arms of ad- 

 miniculum (pi. 26, fig. 96) with numerous teeth, concentrated at apex ; 

 a single, almost triangular tooth near apex and i very long tooth lo- 

 cated halfway along its length; lateral plate subquadrangular, 

 wrinkled. 



Female (pi. 33, figs. 214-216, and pi. 35, fig. 251). — 2.8 mm. long. 



Head : Dichoptic. Eyes black ; base of fronto-ocular triangle twice 



