158 Annals of the South African Museum. 
dark browu, especially iuwardly ; scutellum and postnotum yellowish- 
l)uff, the latter sparsely pale polliuose. Pleura pale whitish with 
lirowu spots. Halteres slender, pale yellow, darkened toward the 
knob, which is yellowish at the tip. Legs with the coxae pale with a 
sparse whitish bloom : trochanters yellow ; femora dull brownish- 
yellow, darkened towards the tips ; tibiae and tarsi dark brown. 
Wings with a pale grey tinge, more whitish subhyaline on the apical 
half ; costal cell pale brownish-yellow ; stigma prominent, rectangular, 
dark browu ; tip of the wing infuscated ; brown seams along the cord 
and the veins excepting M and 1st A ; a large white blotch before and 
beyond the stigma and the whole area distad of the basal deflection of 
Cmj whitish subhyaline ; veins dark brown, excepting Rs, R^ between 
the origin of the sector and the stigma and the fork of M which are 
light yellowish-orange ; numerous hairs in all the apical cells of the 
wings. Venation (Plate XI, fig. 21), Rs short, oblique, tip of i?n 
atrophied ; fused portion of Cu-^ and M, that portion of M between 
r-m and the first fork, and the petiole of M^ -r ^ all subequal or the 
second a little longer. 
Abdomen yellowish-orange, the tergites with the caudal half of each 
segment brownish-black ; sternites more uniformly yellow. 
Female. — Similar to the male, but the antennae shorter and the 
frontal prolongation of the head without the distinct, narrow, median 
browu Hue. 
Hahifat. — South Africa. 
Holotype, ^J , Hottentot-Hollands Mountains, altitude 4000 ft., 
Caledon, Cape Colony, 1916 (Barnard). 
Allotype, 9 , Winterhoek Mountains, Tulbagh, Cape Colony, altitude 
3600 ft.", April, 1916 (R. M. L.). 
Type in the South African Museum. 
Gen. MEGISTOCERA, Wiedemann. 
1828. Aussereur. Zweifl. Ins., vol. 1, p. 55. 
Megistocera bicauda, Speiser. 
1909. Dem Kilimand., dem Meru Exped., Dipt. 10, Orthorr. 4, 
pp. 53, 54. 
One female, Dunbrody, Blue Cliff, Cape Colony, April 2nd, 1912, 
agrees well with Speiser's description of the species, but the general 
coloration of the fly is much darker than stated by Dr. Speiser, the 
chestnut-brown shades, as described, being very dark brown. In spite 
of these slight differences I believe it to be the same species ; the 
cloudings on the wings are also a little more extensive than indicated 
