254 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I25 



9 + 10 ; scape and pedicel light brown, flagellum dark brown with white 

 pruinosity. Palpi dark reddish brown; clypeus somewhat extended, 

 white-pruinose with long black hairs. 



Thorax : Mesonotum velvety black with band of white pruinosity 

 completely encircling it along the periphery, much wider on anterior 

 margin; long, silvery to pale-yellow, scalelike hairs on entire meso- 

 notum, denser on anterior fourth and along the periphery, longer in 

 prescutellar region, never in packets ; some long black hairs on pre- 

 scutellar region. Humeral angles shiny, with white pruinosity. Scu- 

 tellum reddish brown, gray-pruinose, with silvery to pale-yellow scale- 

 like hairs and long black hairs. Postnotum black, with gray pruinosity, 

 devoid of hairs. Pleura evenly white-pruinose. Stem of halter short, 

 broad, brown in color, the knob pale yellow, cup-shaped. Wings, 

 3.0 mm. long and 1.4 mm. wide ; relation of length of body to wing, 

 1:1; Sc pilose on basal fourth ; Ri pilose and spiny on distal half ; 

 R2+3 pilose except for basal fifth ; Cu2 arcuate ; discal cell absent. 



Legs : Leg i, length, 2.7 mm. ; coxa, trochanter, and femur reddish 

 brown ; tibia light brown with apical fourth dark ; tarsus dark reddish 

 brown. Leg 2, length, 2.6 mm. ; coxa dark brown to black ; trochanter 

 dark brown to black with basal light patch ; femur reddish brown, with 

 black apical ring and light preapical area ; tibia and basitarsus light 

 brown on basal half, black on apical half ; tarsal segments 2-5 black. 

 Leg 3, length, 3.3 mm.; coxa dark brown; trochanter light brown; 

 femur reddish brown ; tibia reddish brown with light basal ring ; an- 

 terior half of basitarsus light brown, the remainder black ; tarsal seg- 

 ments 2-5 black ; relation of basitarsus to second segment, 4.2 : i ; 

 calcipala well developed, reaching only halfway to pedisulcus ; pedi- 

 sulcus not deeply incised but easily visible. 



Abdomen : Tergite and pleurites of segment i black, the pleurites 

 with long black hairs that reach segment 4. Segment 2 black, the 

 pleurites white-pruinose. Other segments black, the pleurites white- 

 pruinose on anterior half. All segments clothed with short black hairs. 

 Sternites white-pruinose. 



Genitalia: Sidepiece (pi. 26, fig. 103) only slightly wider than 

 long ; dorsal opening occupying more than half of surface of sidepiece. 

 Outer posterior angle protruding, somewhat dome-shaped. Clasper 

 (pi. 26, fig. 103) long and narrow, about one and one-fourth times the 

 length of the sidepiece ; basal third wider than the apical portion, defi- 

 nite bulge on outer dorsal area extending along basal third of clasper ; 

 apex somewhat truncate, with a single strong, blunt terminal spine 

 that appears to emerge from a transverse furrow. Body of adminicu- 

 lum (pi. 26, fig. 105) rectangular, wider than long, with short but 



