90 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL, 125 



Genitalia: Sidepiece (pi. 22, fig. i) cylindrical in shape, the 

 length 1.5 times the width ; dorsal opening oval, occupying more than 

 half the dorsal surface of sidepiece. Clasper (pi. 22, fig. i) conical in 

 shape, somewhat shorter than sidepiece ; basal opening extending along 

 about half its length ; apex pointed, with two rather heavy terminal 

 spines. Body of adminiculum (pi. 22, fig. 2) dome-shaped, wider than 

 long, the median portion with small patchlike areas from which very 

 short hairs appear to emerge ; apical margin with longer hairs ; basal 

 processes short, blunt, heavily sclerotized only along margins and at 

 very ends ; outer margins of basal processes with spurlike projections 

 that are directed posteriorly. Arms of adminiculum (pi. 22, fig. 3) 

 without teeth, the lateral plate roughly triangular in shape. 



Fejnale (pi. 28, figs. 1 18-120, and pi. 35, fig. 269.). — 3.2 mm. long. 



Head : Dichoptic ; base of f ronto-ocular triangle equal to its height. 

 Antenna 580 ju, long, 11 -segmented, flagellum tapering; segments i and 

 2 very wide and long; segment 3<i-l-2, 3<4+5, 3>ii; scape and 

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

 clypeus black, white-pruinose, irregularly clothed with both yellow and 

 black hairs. Occipital region black, densely covered with yellow hairs. 

 Cornuae of buccopharyngeal apparatus slender, sharp-pointed, heavily 

 sclerotized at ends ; median space hyaline and smooth. 



Thorax: Mesonotum black, with bloom of gray pruinosity; at 

 times with three very dull longitudinal stripes extending from anterior 

 margin to prescutellar region ; densely covered by very long, narrow, 

 appressed, silvery hairs, and with a few pale yellow ones ; a few long, 

 fine black hairs in prescutellar region. Humeral angles brown, with 

 silvery appressed hairs. Scutellum dark brown to black, with numer- 

 ous flat, appressed, silvery hairs and several long black hairs. Post- 

 notum velvety dark brown, white-pruinose, devoid of hairs. Pleura 

 dark brown, with tan pruinosity; pre-alar group composed of both 

 black and silvery hairs. Stem of halter with dark-brown base becom- 

 ing lighter toward the apex, the knob light reddish brown. Wings, 

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

 I.I : i; Sc completely pilose; Ri completely pilose, with spines also 

 along the distal third ; R2+3 completely pilose ; Cu2 arcuate ; discal cell 

 present. 



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

 tibia dark brown; basitarsus and basal half of second segment tan, 

 the remaining tarsal segment brown. Leg 2, length, 2.5 mm. ; coxa, 

 trochanter, femur, and tibia dark brown ; basitarsus tan ; basal half of 

 second and third tarsal segments tan, the remainder of these segments, 

 as well as all of segments 4 and 5, dark brown. Leg 3, length, 3.4 mm. ; 



