8 PEOCEEDINGS OF TETE NATIONAL MUSEUM vol.69 



except the back is yellow in ground color, overlaid on the para- 

 frontal and parafacial by silvery shining pollen which becomes duller 

 on the cheek; parafacial with a few minute delicate pale hairs diffi- 

 cult to see. Antennae red, third joint about twice the second, arista 

 bare, red at base; vibrissae almost the entire length of the third 

 joint above the oral margin which projects strongly forward below 

 them. Hairs of the cheek wholly white except a single row of bris- 

 tles along the margin of the mouth and extending up to the vibrissae. 

 These bristles do not extend back around the posterior edge of the 

 mouth. Palpi yellow, proboscis black. 



Thorax metallic green, heavily overlaid with white pollen which on 

 the dorsum is interspersed with very conspicuous dots where the 

 hairs and bristles originate. The metallic ground color shows dark 

 on pleurae and dorsum as well as the metanotum. The hair of the 

 pleura is almost entirely white, the bristles, however, black. Pros- 

 ternum with very conspicuous tuft of white hair. Acrostichal 2, 4 

 (none immediatly before suture); dorsocentral 2,4; humeral 3; 

 posthumeral 2; presutural 2; supraalar 3; intraalar 4; postalar 2; 

 scutellum with two lateral and one large apical, the discal pair 

 indistinct; sternopleural 1, 1 ; pteropleural short. Calypters almost 

 pure white, the hind one slightly yellow in the middle. Abdomen 

 short, broad, and rounded, yellow in ground color except on the 

 median line and the posterior edge of the third and a large part of 

 the fourth segments. First segment without median marginals; the 

 second only with depressed hairs along the hind margin; the third 

 with small bristles also depressed along the hind margin; the fourth 

 without discals, but a row of erect marginals. Genital segments 

 black, the two side pieces of the fifth sternite bearing a dense brush 

 of short spines on each side of the cleft which become more scattered 

 and longer toward the tips of the lobes. 



Legs black, the coxae and front femora with metallic green reflec- 

 tion; all the knees, tibiae except apices, and basal part of first tarsal 

 segments, yellow or brownish yellow. Claws and pulvilli but little 

 elongated. Middle femur with a row of bristles on the basal half of 

 the lower posterior edge. Hind femur with a row on the lower 

 anterior and on the basal half of the lower posterior. Middle tibia 

 with one bristle on outer front side; hind tibia with three bristles 

 on the outer and tliree on the inner extensor side. 



Wing subhyaline; fourth vein with rounded obhque bend, at its 

 tip becoming almost parallel with the tliird, ending only a little 

 before the apex. Third vein with only two or tln-ee minute setules 

 at base; stem vein distinctly ciliated, as in all this tribe. 



Female. — With the front at vertex 0.27 (average of three speci- 

 mens 0.24, 0.28, 0.28) ; one upper frontal is reclinate, the remainder 

 decussate; pollen of front and face more yellowish than in the male. 



