178 Annals of the South African Museum. 



portions paler, brownish or brownish-yellow ; lateral stripes very 

 broad, especially anteriorly ; scutum obscure yellowish medially, the 

 lobes largely shiny black ; scutellum obscure yellowish-brown, almost 

 black caudally ; postuotum with the dorsal median portions con- 

 spicuous light yellow, the caudal third almost black ; lateral portions 

 of the postnotum black with a conspicuous oval, light yellow mark 

 just before the base of the halteres. Plem-a with the lateral margins 

 of the propleura brownish ; remainder of the pleura brownish-red 

 with conspicuous light yellow marks as follows : On the dorsal half 

 of the mesosteruum, interrupted above the middle coxae ; on the 

 mesepimeron and metaepistemum, and a more obscure blotch on the 

 dorsal portions of the mesepimeron underneath the wing-root. Hal- 

 teres brown, the tips of the knobs a little brighter. Legs with the 

 3oxae and trochauters brownish-red ; anterior femora black, the basal 

 quarter brighter, reddish-brown ; posterior femora yellowish-brown, 

 broadly tipped with blackish ; tibiae brown, narrowly darkened at 

 their tips ; tarsi brown. Wings with a strong yellowish tinge, the 

 costal cell a little suffused ; stigma conspicuous, dark brown ; a broad, 

 light brown seam along the basal deflection of -K 4 + : , and the r-m 

 cross-vein; apex of the wing broadly suffused with brown. Venation 

 (Plate XII, fig. 39), cell M } short-petiolate. 



Abdominal segments brownish-yellow, the basal tergite black ; 

 segments two and three with a broad, black, caudal margin that is, 

 continued back up the sides of the segments for a short distance ; 

 segments six to eight largely black; hypopygium black with the 

 outer pleural appendage conspicuously brownish-yellow. Hypo- 

 pygium (Plate XIV, fig. 67) with the ninth tergite large, the caudal 

 margin with a prominent U-shaped notch, the lateral lobes shiny,, 

 smooth ; caudal margin blackened, medially with a deep, rounded 

 incision and with abundant black spicules that are most numerous at 

 the opening of the lesser incision, more sparse and scattered on the 

 dorsal portions of the sclerite ; outer pleural appendage large, con- 

 spicuous, the tip drawn out in a long point ; ninth pleurite not 

 complete, the pleural suture rather long, curved dorsad at its cephalic 

 end. 



The female is similar to the male, differing as follows : antennae 

 shorter ; black bauds on the abdomen broadest on segments one to 

 three, successively narrower on four and five, complete and very 

 intense on six and seven ; segments eight and nine, including the 

 ovipositor, yellowish ; lateral margins of the tergites black excepting 

 the basal half of segment two ; sternites dull yellow except on segment 

 seven, which is largely black. 



