214 Annals of the South African Museum. 



Mesonotum brownish-grey, the praescutum with three indistinct 

 darker brown stripes ; scutum dull grey, the lobes indistinctly 

 brownish ; scutellum brownish-grey ; postnotum blackish-grey, very 

 narrowly yellowish anteriorly. Pleura blackish with a heavy grey 

 pruinosity, the dorso-pleural membrane yellowish, clearest near the 

 base of the halteres. Halteres long, black throughout. Legs with 

 the coxae black, the posterior face of the hind coxae yellowish ; 

 trochanters dull yellowish ; legs black. Wings long and narrow, with 

 a long basal petiole ; membrane faintly greyish, the subcostal cell 

 brown ; stigma oval, pale brown, not passing beyond the radial cross- 

 vein ; veins dark brown. Venation : Sc 2 ending about opposite two- 

 thirds the length of the long straight sector ; tip of _R 2 atrophied, 

 represented only by a small spur ; cell 1st M 2 long, hexagonal ; petiole 

 of cell MI short, a little longer than m ; m a little longer than the 

 fusion of CU-L and M. A + 4 ; second anal vein straight, almost parallel 

 with the anal margin of the wing. 



Abdominal tergites blackish, the segments yellowish on the sides, 

 brightest and most conspicuous on the 'eighth tergite ; sternites dark 

 brownish-black, paler laterally. Male hypopygium with the ninth 

 tergite distinct from the sterno-pleurite. Ninth tergite with a broad 

 posterior incision, each small lateral lobe armed with numerous slender 

 black spines ; posterior lateral regions of the caudal margin broadly 

 notched. Ninth pleurite narrow, projecting, at its tip bearing a com- 

 plicated pleural appendage. .Pleural appendage a chitinised blade 

 with the outer lateral margin irregularly and minutely serrulate, at 

 the tip suddenly narrowed to an oval lobe that juts into the notch of 

 the tergite ; the outer proximal margin with a row 7 of delicate long 

 hairs that are directed backward ; near the base of the appendage on 

 the outer side with a sharp arm that is fringed with long hairs, at its 

 tip with a few smaller ones. Ninth sternite broadly menibranaceous, 

 the posterior margin with dense fringes of long golden-yellow hairs. 

 Eighth sternite extensive, unarmed. 



Habitat. South Africa. 



Holotype, ^,Caledon, Cape Colony, October, 1918 (L. Peringuey). 



Type in the South African Museum. 



GEN. LONGUKIO, Loew. 



LONGURIO CAPICOLA, Sp. U. 



Nasus bifid, with long reddish-yellow hairs ; head reddish-brown ; 

 wings almost uniform yellowish-brown, without a subhyaline longi- 



