146 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I25 



panded to form a snoutlike structure, at the very end of which there 

 is a single very long, strongly pointed terminal spine. Body of ad- 

 miniculum (pi. 23, fig. 38) somewhat triangular in shape, broader 

 than long, the apex pointed ; with concavity at center of basal margin ; 

 covered with numerous hairs that are more numerous near the apex ; 

 basal processes short, sclerotized, rather broad at base, tapering to 

 point at apex ; appear as gradual extensions of body of adminiculum, 

 not at strong angle to it. Adminicular arm (pi. 23, fig. 39) with 

 numerous rather long, pointed teeth, extending along entire arm, 

 somewhat shorter near apex; lateral plate rectangular, long, very 

 slightly sclerotized. 



Female (pi. 30, figs. 154-156, and pi, 35, fig. 262). — 2.0 mm. long. 



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

 its base equal to twice its height. Antenna 410 /a long, 11 -segmented, 

 slightly tapering; segment 3<i+2, 3=4-1-5 = 11; scape and pedicel 

 light brown, flagellum gradually darkening from its base to apex. 

 Palpi very dark brown. Frons and clypeus black, white-pruinose, 

 with short tan hairs along their lateral margins. Occipital region 

 black, white-pruinose, with short black hairs. Cornuae of bucco- 

 pharyngeal apparatus heavily sclerotized and broad, except for apices 

 which are sharply pointed ; median space sclerotized, with central 

 concavity, and with 2 irregular rows of large, strong teeth. 



Thorax : Mesonotum velvety black, with a very wide longitudinal 

 band of white pruinosity on either side of the midline, extending from 

 the anterior margin to the white pruinosity of the prescutellar region 

 with which it blends ; the band on each side of the midline tapers some- 

 what, being wider in front, and the distance between the two bands is 

 about equal to the width of any one of the bands ; lateral margins of 

 mesonotum also white-pruinose ; long, narrow, yellow, scalelike hairs 

 distributed over entire surface of mesonotum ; some short black hairs 

 on mesonotum, slightly longer in prescutellar region. Humeral angles 

 black, white-pruinose, with yellow scalelike hairs. Scutellum dark 

 brown, shiny, with several yellow scalelike hairs and a few long black 

 hairs. Postnotum velvety dark brown, with white pruinosity, devoid of 

 hairs. Pleura dark brown, with white pruinosity. Stem of halter light 

 brown, the knob tan to white. Wings, 2.2 mm. long and i.o mm. wide ; 

 relation of body length to wing, 1:1.1; Sc pilose along the basal 

 fourth ; Ri spiny along apical three-fifths ; R2+3 pilose except for short 

 basal section ; Cu2 arcuate ; discal cell absent. 



Legs: Leg i, length, 2.1 mm.; coxa, trochanter, femur, and tibia 

 yellow ; tarsus black. Leg 2, length, 1.8 mm. ; coxa brown ; trochanter 

 and femur tan ; tibia tan with large black patch on outer face ; basi- 



