192 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL, I25 



gressively darker from third segment to apex. Palpi evenly brown. 

 Frons dark brown, white-pruinose, with row of black hairs on each 

 of its lateral margins. Clypeus light brown, white-pruinose, evenly 

 covered with short white hairs. Occipital region dark brown, white- 

 pruinose, with few short black hairs. Cornuae of buccopharyngeal 

 apparatus somewhat lyre-shaped, well sclerotized but not heavily pig- 

 mented ; median space well sclerotized with thick rim along its border, 

 without teeth. 



Thorax : Mesonotum rust brown, the entire periphery gray- 

 pruinose, with 3 longitudinal gray-pruinose stripes along the meso- 

 notum, one down the midline and one to either side of it ; several 

 appressed, silvery, scalelike hairs on periphery of mesonotum, longer 

 in prescutellar region, not in packets ; short black hairs covering entire 

 mesonotum. Humeral angles rust brown, with white pruinosity. 

 Scutellum brown, with some appressed, silvery, scalelike hairs and 

 several long, erect, silvery hairs that are directed anteriorly. Post- 

 notum brown, evenly white-pruinose. Pleura evenly white-pruinose. 

 Stem of halter light brown, the knob white, cup-shaped. Wings, 

 2.5 mm. long and i.o mm. wide; relation of length of body to wing, 

 I : I ; Sc pilose along its basal third ; Ri with hairs and spines along its 

 distal two-thirds ; R2+3 pilose along its distal three-fourths ; Cu2 arcu- 

 ate ; discal cell absent. 



Legs : Leg i, length, 2.5 mm. ; coxa and trochanter tan ; femur tan, 

 with 3 black patches at intervals along its inner margin ; basal and 

 apical thirds of tibia black, middle light brown ; tarsus black. Leg 2, 

 length, 2.3 mm. ; coxa and trochanter tan ; femur tan with apical dark 

 ring ; tibia marked from its base in the following order ; Light patch, 

 dark patch, light patch, the remainder dark with the extreme apex al- 

 most black ; basal two-thirds of basitarsus tan, remainder black ; seg- 

 ments 2-5 black. Leg 3, length, 2.7 mm. ; coxa brown ; trochanter tan ; 

 femur tan with apical dark ring ; tibia marked as on leg 2, with color 

 bands even more pronounced; basal three-fourths of basitarsus and 

 basal half of second segment tan, the remainder of these segments, as 

 well as all of segments 3-5, dark brown; relation of basitarsus to 

 second segment, 6:1; calcipala well developed, reaching the pedi- 

 sulcus ; pedisulcus well developed on basal third of second tarsal seg- 

 ment ; claw with well-developed heel and with secondary subbasal spur 

 (pi. 35, fig. 241). 



Abdomen : Tergite of segment i light brown, with dark-brown 

 transverse stripes ; pleura of this segment velvety dark brown, with 

 long tan hairs that reach the third segment. Segment 2 light brown, 

 with white pruinosity. Segments 3-6 dark brown, the remaining seg- 



