2IO SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 12$ 



white-pruinose. All segments with short black hairs. Sternites dark 

 brown. 



Genitalia: Sidepiece (pi. 25, fig. 73) somewhat wider than long; 

 dorsal opening occupying almost entire dorsal surface of sidepiece. 

 Clasper (pi, 25, fig. 73) long and slender, about 1.5 times length of 

 sidepiece, the apex rounded, wtih a single terminal spine ; with basal 

 process that is long and slender, its length about four times its width, 

 the apex serrate, clothed with hairs. Adminiculum (pi. 25, fig, 74) in 

 form of elongated bonnet, with very small longitudinal keel-like struc- 

 ture near the apex that is clothed with numerous hairs ; several groups 

 of minute spines on ventral surface ; basal processes long, broad, well 

 sclerotized, divergent, pointed at the ends, appearing to be part of a 

 continuous band that crosses the body of the adminiculum at its base. 

 Adminicular arms (pi. 25, fig, 75) with about 15 teeth, about four of 

 them long, the others much shorter ; lateral plate long and slender, 

 wrinkled, partly sclerotized. 



Female (pi. 32, figs. 193-195, and pi. 35, fig. 245). — 2.6 mm. long. 



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

 its height equal to the base. Antenna 480 /x lotig, 11 -segmented, 

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

 brown, the flagellum black. Palpi black. Frons black, with some white 

 pruinosity. Clypeus black, white-pruinose, with some short tan hairs. 

 Occipital region black, covered with many short tan hairs. Cornuae 

 of buccopharyngeal apparatus sclerotized, very broad, ending bluntly ; 

 median space hyaline, with serrations and i large tooth in center. 



Thorax : Mesonotum black ; on each side of the midline and con- 

 tiguous with the anterior margin, there is a large white-pruinose tri- 

 angular patch ; from the posterior apex of the triangle there extends 

 posteriorly a stripe of white pruinosity that blends with the pruinosity 

 on the prescutellar region ; narrow white-pruinose stripe along pos- 

 terior part of midline ; long, narrow, yellow, scalelike hairs scattered 

 over entire mesonotum, dense on anterior fourth and on prescutellar 

 region ; few long black hairs in prescutellar region. Humeral angles 

 black, with short brown hairs. Scutellum black, with some short yel- 

 low, scalelike hairs and some long black ones. Postnotum dark brown 

 with white pruinosity, devoid of hairs. Pleura brown, white-pruinose. 

 Stem of halter brown on its base and tan apically, the knob white to 

 tan. Wings, 2.7 mm. long and 1.2 mm. wide ; relation of body length 

 to wing, 1:1; Sc pilose along basal fifth ; Ri pilose and spiny along 

 distal half ; R2+3 pilose except for very small basal section ; Cuo 

 arcuate ; discal cell absent. 



Legs: Leg i, length, 2.5 mm.; coxa and trochanter black; basal 



