226 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I25 



partially white-pruinose. Stem of halter brown, the knob light brown 

 to yellow. Wings, 2.1 mm. long and 0.9 mm. wide; relation of body 

 length to wing, 1.1:1; Sc pilose along basal eighth; Ri completely 

 pilose, and with spines also along distal half ; R2+3 pilose except for 

 very small basal section ; Cua arcuate ; discal cell absent. 



Legs: Leg i, length, 2.1 mm.; coxa black; trochanter brown on 

 basal half, black on apical half ; femur with basal three-fourths brown, 

 the apical fourth black ; tibia and tarsus black. Leg 2, length, 1.8 mm. ; 

 coxa and trochanter black ; femur brown on basal three-fourths, 

 black on apical fourth ; tibia black on basal and apical fourths, brown 

 on median half ; tarsus black. Leg 3, length, 2.2 mm. ; coxa and tro- 

 chanter black ; femur brown on basal three-fourths, black on apical 

 fourth ; tibia black on basal and apical thirds, median third brown ; 

 tarsus black; relation of basitarsus to second segment, 5-i • 1 5 cal- 

 cipala very well developed, reaching pedisulcus ; pedisulcus well de- 

 veloped at middle of second segment. 



Abdomen : Segment i yellow, the tergite with short black hairs, 

 and the pleura with long black hairs that reach the fifth segment. Seg- 

 ments 2, 3, and 4 yellow, with short black hairs. Segments 5, 6, 7, 

 and 8 black, their pleural region partially white-pruinose ; clothed with 

 short black hairs. Sternites yellow. 



Genitalia: Sidepiece (pi. 26, fig. 85) very slightly wider than 

 long, irregularly quadrangular in shape, with dorsal depression near 

 its apex; dorsal opening occupying about half of dorsal surface of 

 sidepiece. Clasper (pi. 26, fig. 85) shorter than the sidepiece, its 

 length slightly more than twice its width, apex tapering with single 

 subterminal spine. Body of adminiculum (pi. 26, fig. 86) semicircular 

 in shape, the apex rounded, clothed with numerous minute spinelike 

 hairs and longer fine hairs; short longitudinal structure on midline 

 with numerous hairs ; with basal, heavily pigmented ribbonlike struc- 

 ture, the ends of which seem to enter the basal processes ; basal proc- 

 esses short, well sclerotized, tapered but blunt. Arms of adminiculum 

 (pi. 26, fig. 87) with approximately 6 large pointed teeth and with 

 several short teeth, all intermixed and arranged in linear fashion ; 

 lateral plate somewhat triangular in shape, wrinkled. 



Female (pi. 32, figs. 205-207, and pi. 35, fig. 250). — 2.3 mm. long. 



Head: Dichoptic. Eyes black; fronto-ocular triangle very small, 

 the base equal to the height. Antenna 400 /x long, 11 -segmented, 

 slightly tapering; segment 3<i+2, 3<44-5,3>ii; scape and pedicel 

 light brown, the flagellum black. Palpi black. Frons black, white- 

 pruinose, with very few short black hairs. Clypeus black, white- 



