214 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 12$ 



white pruinosity. Stem of halter dark brown, the knob yellow. Wings, 

 2.9 mm. long and 1.3 mm. wide ; relation of body length to wing, 1:1; 

 Sc pilose along its basal fifth ; Ri spiny along distal half (no hairs) ; 

 R2+3 pilose except for the basal eighth ; Cug arcuate ; discal cell absent. 



Legs: Leg i, length, 2.8 mm. ; coxa and trochanter brown; ^emur 

 brown with very small basal and apical dark-brown rings ; basal and 

 apical fourths of tibia black, median half dark brown; tarsus black. 

 Leg 2, length, 2.5 mm. ; coxa, trochanter, femur, and tibia dark brown ; 

 basal two-thirds of basitarsus and basal half of second segment tan, 

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

 Leg 3, length, 3.1 mm.; coxa, trochanter, and femur shiny dark 

 brown ; tibia black except for a very small tan basal patch ; basal half 

 of basitarsus and second segment tan, the remainder of these segments, 

 as well as all of segments 3-5, black ; relation of basitarsus to second 

 segment, 5:1; calcipala well developed, reaching the pedisulcus ; pedi- 

 sulcus not very deep, formed at middle of second segment. 



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

 with long black hairs that reach the fifth segment. Segment 2 dark 

 brown, its anterior half white-pruinose. Other segments very dark 

 brown, pleurites with gray pruinosity. All segments clothed with 

 numerous black hairs. Sternites tan. 



Genitalia : Sidepiece (pi. 25, fig. 76) wider than long, with con- 

 cavity at middle of apical margin, the two apical angles somewhat 

 prolonged ; dorsal opening occupying more than half the dorsal surface 

 of sidepiece. Length of clasper (pi. 25, fig. 76) about four times its 

 average width, narrower toward the middle than at either end ; apex 

 rather blunt, without apical spine but with a very long slender hair 

 that is quite removed from apex; with basal triangular prolongation 

 which is clothed with hairs. Body of adminiculum (pi. 25, fig. "jj) in 

 shape of bonnet, the apex strongly convex ; with semicircular band of 

 hairs that surrounds a circular bare region at apex ; heavily sclerotized 

 band at base of adminicular body that approximates the contours of 

 the latter in shape, its ends appearing to enter the basal processes ; 

 basal processes short, divergent, well sclerotized, somewhat pointed, 

 with backward-directed spurlike structures. Arm of adminiculum 

 (pi. 25, fig. 78) with several (20-30) teeth along its length, both short 

 and long ones intermixed ; lateral plate triangular, with wrinkles. 



Female (pi. 32, figs. 196-198, and pi. 35, fig. 249). — 2.9 mm. long. 



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

 its base equal to its height. Antenna 580 /x long, ii-segmented, 

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

 light brown, flagellum black. Palpi dark brown. Frons dark brown. 



