152 Annals of the South African Museum. 
This delicate species bears a certain i-esemblance to species iu many 
widely separated regions of the world, especially as regards the 
arrangement of media and its branches — the hlanda group (Hol- 
arctic), Gonomyia proxima,'&v\mett\ (Oriental), and even to Ptilostena^ 
Bergroth (Ann. Mag. Nat. Hist., ser. 8, vol. 11, p. 575-678, 1913). 
The last-named group is separated from Gonomyia because of its 
arrow petiolate wings, the long Sc^ and the peculiar shape of cell Rc> 
of the wings ; G. spuria shows all of these characters except the last, 
and it seems doubtful whether Ptilostena should receive more than 
sub-generic rank. Edward's Thau mastopt era aldahrensis (Trans. Linn. 
Soc. Lond., vol. 15, pt. 2, p. 205, pi. 10, fig. 10, 1912) is also a Gonomyia 
that shows many characters in common with Ptilostena. It may here be 
mentioned that the Teucholabis flavonotata, Edwards (lac. cit., pp. 205, 
206, pi. X, fig. 11), from the Seychelles Islands is a Gonomyia, closely 
resembling 6r. sulphu,rella, Osten Sacken (E. Nearctic). 
Sub-gen. GONOMYELLA, sub-gen. n. 
Differs from Gonomyia, s.s., as follows : Wings with the subcosta 
elongate, cell jRo very large; radial cross-vein present; cell 1st M^ 
open by the atrophy of m or the outer deflection of M.^. 
Typeof thesub-genus. — (?o??o»?7/?asZos80H,ae, Alexander (Neotropical). 
Besides the two Ethiopian species described in this paper, Gonomyia 
velutina, Alexander (Peru) also belongs to this group. 
Gonomyia (Gonomyella) natalensis, sp. n. 
Head light grey ; thorax grey with three brown stripes ; pleura 
striped grey and pale yellow ; abdominal tergites uniformly dark 
brown ; wings with subcosta elongate, cross-vein r present and con- 
nected with -Ro + 8, cell 1st M..-, open by the atrophy of the outer 
deflection of ilf.^. 
i^emflie. — Length about 6-6 mm. ; wing 62 mm. 
Rostrum short, black, with a sparse greyish bloom ; palpi black. 
Antennae rather elongated for this sex, black, the first segment about 
as long as the two following combined ; flagellar segments elongate- 
oval with an abundant white pubescence. Head clear light grey, the 
vertex with a faint suffusion of brown ; space between the eyes very 
broad. 
Prouotum prominent, light grey, broadly darker medially, the 
scutellum more pallid, brownish-yellow. Mesouotal praescutum light 
grey with three dark brown stripes, the median stripe broadest, 
ending just before the transverse suture ; pseudosutural foveae 
prominent, elongate, subtriangular, shiny black ; tuberculate pits 
