﻿152 Annals of the South African Museum. 



Type (^ , a single specimeu from Hex River ; December, 1884 

 (L. Periuguey). 



(^ . Length of the body 7 mm. ; of the wing 7 mm. ; of the wing- 

 spread 16 mm Head entirely shining black, but dai'k reddish bi'own 

 on the face below and at the hind border of the occiput; the mouth 

 borders are narrowly yellowish. The occiput is denuded in case of 

 the type, but the central fringe is blackish, and at the borders of the 

 eyes, chietly near the indentation, there is a silvei'y, scaly tomentum. 

 Frons at vertex as broad as the ocellar tubercle, but quickly broadening 

 beyond the middle ; it is clothed with black erect hairs and has short, 

 scattered, silvery hairs on the front half. Face conically produced but 

 blunt, clothed with black hairs and with some silvery, shorter ones. 

 The two basal joints of the antennae are black, the first being clothed 

 with black hairs; the third joint is dark reddish, shortly conical, 

 about as long as the first joint, with a short terminal style. Proboscis 

 as long as the mouth opening, dirty blackish ; palpi thin, upturned, 

 dark yellowish. Thorax entirely black, and (Avheu denuded) rather 

 shiny; humeral and post-alar callosities brownish like the greatest 

 part of the pleurae ; on the back of the mesonotum there are black 

 hairs and brownish tomentum ; the collar is black ; the pleurae have 

 black and dark yellowish hairs ; all the macrochaetae are black. 

 Scutellum dark brown with a black base, clothed like the liack of 

 mesonotum. Scjuamulae brown with white fringe; plumula Avhite ; 

 haltères yellowish. Abdomen shining black, with the segments 

 narrowly brown at hind border ; it seems to be clothed with black 

 hairs, and with brownish, scaly tomentum, but at the base, on each 

 side of the two first segments, there is a spot of white scales, clothed 

 Avitli white hairs ; the last two segments also seem to have silvery 

 scales at the base. Venter black, with silvery scaly tomentum ; 

 genitalia reddish-brown. Legs black, with reddish brown tibiae and 

 tarsi ; front pair abbreviated, with smooth tibiae ; spines black ; claws 

 simple, reddish yellow, Avitli black tips. Wings proportionately short 

 and broad, with a very distinct pattern. At base they are dark 

 yellowish brown to the base of the discoidal cell ; an elongate, deep 

 black spot on the second basal cell is very striking, and is placed 

 symmetrically across the basal portion of the fourth longitudinal 

 vein. In the middle the wings are black, the edge going obliquely and 

 sinuously from the end of the auxiliary vein to the end of the anal 

 cell ; the discoidal cell is filled up with black to the end, only its 

 upper corner being narrowly hyaline ;• in the marginal cell the black 

 ends rather obliquely and a little before the upper end of the marginal 

 cross-vein. The apical part of the wings is hyaline and stx'ougly 



