16 Mr. R. E. Turner on 
distance between the eyes a little less than in the female ; 
seventh tergite rather broadly truncate at the apex; eighth 
sternite widely and very shallowly emarginate on the apical 
margin, the angles not produced into teeth. Third cubital 
cell rather short on the cubitus, not extending beyond the 
radial cell, third abscissa of the radius longer than the second. 
Hab. Natal, Durban (South African Museum), April, 2. 
One male from Natal in the British Museum. 
12. Tachytes memnon, Turn. 
Tachytes memnon, "Turn. Ann, & Mag. Nat. Hist. (8) xvii. p. 446 
C1916), 2 
2. Very close to 7. natalensis, differing in the colour of 
the pubescence on the front and pygidial area, in the colour 
of the anterior tibiz and of the base of the antenne; in 
the distinctly longer second joint of flagellum, in the absence 
of large punctures on the clypeus, and in the distinctly 
narrower pygidial area. 
Hab. Nyasaland, Mlanje (S. A. Neave), April. 
Possibly a northern subspecies of natalensis. 
13. Tachytes prestabilis, sp. n. 
@. Nigra; clypeo, fronte thoraceque pallide aureo-pubescentibus, 
pilis fulvidis intermixtis ; segmentis dorsalibus 4 basalibus fascia 
apicali argenteo-pubescente; area pygidiali fusco-ferrugineo- 
setosa; tegulis testaceis; mandibulis fusco-ferrugineis; tibiis 
tarsisque anticis, calcaribus, unguiculisque ferrugineis; alis 
flavidulis, venis fusco-ferrugineis. 
¢. Femine similis; segmento dorsali septimo pallide et sparse 
ferrugineo-setoso. 
Long., 2 15-16 mm., ¢ 13 mm. 
?. Clypeus closely and finely punctured, with large 
punctures intermixed, deflexed towards the apical margin, 
which is subtruncate with a distinct tooth on each side; 
vertex with a few fairly large, scattered punctures ; eyes 
separated on the vertex by a distance slightly exceeding the 
length of the second joint of the flagellum. Galez very 
long and narrow at the apex, rostrate. Basal joint of fore 
tarsus with six spines. Median segment half as long again 
as the scutellum, the median sulcus almost obsolete on the 
dorsal surface. Second sternite minutely and closely 
punctured ; pygidial area broadly triangular, narrowly 
rounded at the apex. Third cubital cell extending a little 
beyond the apex of the radial cell. 
