172 Annah of the South African Museum. 
Habitat. — South Africa. 
Holotype, ^^ , Wiuterhoek Mountains, Tulbagh, Cape Colony, alti- 
tude 3600 ft., 1916 (E. M. L.). 
Type in the South African Museum. 
Gen. NEPHEOTOMA, Meigen. 
1803. Illiger's Mag., vol. 2, p. 262. 
1834. Macquart, Hist. Nat. des Insect. ; Dipt., vol. 1, p. 88 
(Pachyrrhiva). 
The South African species of this difficult genus are still not well 
understood. There are eleven described species that may he considered 
regional, five of which (aurantiaca, Macquart, peiiolata, Macquart, 
delegorguei, Macquart, crocea, Loew, and capensis, Eondaui) are 
apparently very closely related, and I have been unable to distinguish 
them satisfactorily ; they belong to the group of species with black 
thoracic stripes and the intermediate abdominal tergites with black 
markings of various shapes and greater or less extent. To determine 
these species accurately it will be necessary to have an abundance of 
material and to study the type-specimens where they are in existence. 
Unfortunately most of the species were described from female speci- 
mens, which sex shows very few of the necessary specific characters. 
Nephrotoma umbripennis, sp. n. 
Antennal flagellum dark brown ; head orange-yellow ; thoracic 
praescutum with the median stripe chestnut margined with l)lack ; 
scutellum and postnotum pale ; pleura spotted yellow and pale 
reddish ; abdomen with the basal tergites unmarked medially ; wings 
suffused with brownish ; m-cu cross-vein beyond the fork of M ; Rs 
somewhat elongated ; cell M^ sessile. 
Male. — Length 14-4 mm. ; wing 15-3 mm. 
Frontal prolongation of the head short, pale yellow ; palpi brown. 
Antennae moderate in length, the scape yellow, the second segment a 
little darker ; first flagellar segment pale basally, passing into dark 
brown at the tip; remaining segments dark brownish-black on the 
basal swelling, the pedicels dark brown ; first flagellar segment 
elongated, longer than the combined scape ; remaining flagellar 
segments deeply incised beyond the basal swelling. Head orange, 
the occipital mark dark brown, very large, sending its anterior angle 
far up on to the frontal tubercle. 
Pronotum dull yellow medially. Mesonotal praescutum dull yellow 
with three stripes ; median stripe rich chestnut-brown, broadly 
