36 Mr. R. E. Turner on 
the combined length of the two basal joints of the flagellum. 
Basal joint of fore tarsus with eight spines. Median segment 
at ieast half as long again as the scutellum, without a 
longitudinal sulcus on the dorsal surface. Sternites sub- 
opaque, very closely and finely punctured, with long sparse 
pubescence. Seventh tergite very broadly rounded at the 
apex, clothed with silver pubescence, slightly tinged with 
gold. Eighth sternite broadly rounded or subtruncate at 
the apex, the angles not produced. 
Hab. Nyasaland, 8.E. shore of Lake Nyasa, between 
Fort Maguire and-Fort Johnston (S. A. Neave), March. 
42. Tachytes inexorabilis, sp. n. 
@. Niger; fronte clypeoque argenteo-pilosis ; thorace segmentoque 
mediano cinereo-pilosis ; segmentis dorsalibus 4 basalibus fascia 
apicali argenteo-pubescentibus ; tarsis fusco-ferrugineis ; calcari- 
bus pallide ferrugineis; tegulis testaceis; alis hyalinis, basi 
pallidissime flavo-tinctis, venis ferrugineis ; area pygidiali rufo- 
fusco-setosa. 
¢. Femine similis; segmento septimo dorsali subargenteo-pubes- 
cente. 
Long., 9 14 mm., ¢ 12-14 mm. 
?. Clypeus broadly rounded at the apex ; vertex finely 
and closely punctured, with a few larger punctures ; eyes 
separated on the vertex by a distance equal to the length of 
the second joint of the flagellum plus half of the third joint. 
Galea ratier short, broadly rounded at the apex. Scutellum 
distinctly punctured ; the median segment more than half 
as long again as the scutellum. Second sternite subopaque, 
very minutely and closely punctured ; pygidial area broadly 
triangular, subacute at the apex. Third cubital cell ex- 
tending very little further than the radial cell; the distance 
between the recurrent nervures on the cubitus greater than 
usual, fully equal to the third abscissa of the radius. Basal 
joint of the fore tarsus with six spines. 
6. Seventh tergite broadly rounded at the apex; eighth 
sternite rather shallowly emarginate, the teeth of the apical 
angles blunt. Eyes separated on the vertex by a distance 
about equal to the length of the two basal joints of the 
flagellum. 
Hab. Transvaal, Johannesburg (4. J. Cholmley) ; Natal, 
Howick (J. P. Cregoe). | 
Very near ¢ransvaalensis, Cam., but the pygidial area is 
much more broadly triangular and the pubescence on it 
coarser. ‘The condition of Cameron’s type, however, is so 
—=_ro = a 
