264 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 1 25 



Ri pilose and spiny along distal half; R2+3 pilose along distal five- 

 sixths ; Cu2 arcuate ; discal cell absent. 



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

 tibia black, its posterior edge near the midregion light brown ; tarsus 

 black. Leg 2, length, 2.8 mm. ; coxa, trochanter, and femur black ; 

 tibia black with light-brown basal ring ; basal third of basitarsus yel- 

 low, its distal two-thirds black; tarsal segments 2-5 black. Leg 3, 

 length, 3.4 mm. ; coxa, trochanter, femur, and tibia with same color 

 patterns as on leg 2 ; basal third of basitarsus and of second segment 

 light brown, their apical two-thirds black ; segments 3-5 black ; basi- 

 tarsus extremely wide; relation of basitarsus to second segment, 

 3.8 : 1 ; calcipala well developed, not quite reaching the pedisulcus ; 

 pedisulcus well developed on basal third of second segment. 



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

 with long dark hairs which reach segment 5. Segment 2 black, the 

 anterior border of the tergite, and the pleurites white-pruinose. Other 

 segments black, the posterior borders white-pruinose. Sternites black 

 with white pruinosity. 



Genitalia: Sidepiece (pi. 27, fig. 109) rectangular, wider than 

 long, outer posterior angle rounded and somewhat prolonged ; dorsal 

 opening occupying about half of dorsal surface of sidepiece. Clasper 

 (pi. 27, fig. 109) long and narrow, more than twice as long as side- 

 piece ; swelling on outer dorsal margin, extending from base to almost 

 the middle ; apex rounded, somewhat truncate, with a terminal spine 

 that is bifid from the base, blunt. Body of adminiculum (pi. 27, fig. 

 no) dome-shaped, the apex pointed; length about equal to width; 

 along ventral surface there is a longitudinal keel-like structure, not very 

 high, which is clothed with numerous hairs ; middle two-thirds of 

 ventral surface clothed with hairs; basal processes well sclerotized, 

 pointed. Adminicular arms (pi. 27, fig. in) with several teeth, two 

 long ones near the base, some long and short ones concentrated at the 

 apex, and a few short ones between the apical and basal teeth ; lateral 

 plate irregularly rectangular in shape, wrinkled, somewhat sclerotized. 



Female (pi. 34, figs. 229-231, and pi. 35, fig. 256).— 2.7 mm. long. 



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

 its base equal to the height. Antenna 540 /x long, 11 -segmented, 

 slightly tapering ; segment 3<i+2, 3 = 4 + 5, 3>ii; scape and pedicel 

 brown, flagellum black. Frons, clypeus, and occipital region black, 

 white-pruinose, irregularly covered with long black hairs. Cornuae of 

 buccopharyngeal apparatus short, sclerotized, the apices expanded; 

 median space hyaline, without teeth. 



Thorax : Mesonotum velvety black ; a triangle of white pruinosity 



