Diptera from South Africa, 103 
covered by them, and in some specimens there are a few 
scattered ones on the posterior borders of the middle seg- 
ments; pubescence black: the underside is black with the 
posterior margins narrowly red, the pubescence consisting of 
long black hairs and some greyish tomentum. Legs black. 
Wings dark brown, becoming lighter on the posterior 
border, with a light spot in the second basal cell; there is an 
irregular long, narrow, clear stripe in the centre of the 
discal and anal cells, the apex of the wing is quite clear; 
there are spots of darker shading on the anterior part of 
the vein between the first and second submarginal cells, 
on the root of the fore branch of the third longitudinal 
vein, on the upper part of the vein dividing the discal from 
the second posterior cell, afaint one on the base of the nerve 
between the second and third posterior cells, one at the base 
of the inner part of the third posterior cell, and one on 
the cross-vein dividing the second basal cell from the fourth 
posterior, one encloses the cross-vein between the third 
and fourth longitudinal veins, and one occurs at the base 
of the second longitudinal vein ; in some of the specimens 
there is a faint spot on the end of the second longitudinal 
vein; veins brown, the small cross-vein is in the centre 
of the discal cell, and the root of the second longitudinal is 
just below it; the first posterior cell is half as wide as the 
second posterior at its opening, the third at its opening is 
only a little wider than the second and about the same width 
as the fourth. 
Length 12 millim. Some of the specimens measure only 
9 millim. 
Types (male and female), Pretoria (W. L. D.). 
The female type has an extra faint spot on the end of the 
upper branch of the third longitudinal vein, besides one on 
the end of the second longitudinal. 
Length 9 millim. 
HyPERALONIA. 
Rondani, Archiv. Zool. Canestr. iii. p. 57 (1863) ; Osten Sacken, 
Biol. Centr.-Am., Dipt. i. pp. 78-80 (1886). 
In this species a tooth at the base of the ungues on the 
posterior legs is present, as in Hxoprosopa, so that the 
absence of these cannot be taken as a characteristic of 
the genus, as suggested by Osten Sacken in Biol. Centr.-Am., 
where he remarks that no species from the Cape had yet been 
discovered. 
