28 Mr. R. E. Turner on 
31. Tachytes irritadilis, sp. n. 
¢@. Niger; segmentis abdominalibus margine apicali anguste 
brunneis; tegulis testaceis; femoribus apice extremo, tibiis 
tarsisque fulvo-ferrugineis; alis flavo-hyalinis, venis ferrugineis; 
fronte clypeoque pallide aureo-pubescentibus; thorace seg- 
mentoque mediano griseo-aureo-pubescentibus ; segmentis dorsal- 
ibus 4 basalibus fascia interrupta apicali argenteo-pubescente ; 
area pygidiali pallide aureo-pubescente ; galea modice elongata, 
scapo dimidio longiore. 
Long. 11 mm. 
3. Clypeus very broadly rounded at the apex, with three 
minute teeth on each side; vertex rather closely punctured ; 
eyes separated on the vertex by a distance not quite equal 
to the length of the second joint of the flagellum ; second 
and third joints of the labial palpi subequal. Thorax closely 
microscopically punctured; median segment about half as 
long again as the scutellum. Second sternite finely but not 
very closely punctured, thinly clothed with long fulvous 
hairs ; seventh tergite broadly rounded at the apex; eighth 
ventral segment strongly emarginate, the apical angles 
bluntly produced. Basal joint of fore tarsi with four spines ; 
spur of hind tibiz as long as the basal joint of the hind 
tarsus. Radial cell narrowly rounded at the apex; third 
abscissa of the radius a little longer than the second, but 
slightly shorter than the space between the recurrent 
nervures on the cubitus. 
Hab. Nyasaland, Mlanje (S. A. Neave), December. 
In the length of the galea this species is nearly allied to 
T. separabilis, from which it is separated by the smaller 
size, the rounded apex of the seventh tergite, and the lesser 
number of spines on the basal joint of the fore tarsus. In 
the latter case it is possible that the normal number of 
spines in this species may be five, as they are liable to be 
broken, but certainly not six as in separabilis. 
32. Tachytes testaceinerva, Cam. 
Tachytes testaceinerva, Cameron, Sjéstedt, Kilimandjaro-Meru Exp. ii. 
p. 283 (1910). @. 
¢@. Nigra, mandibulis basi, scapo subtus, tegulis, femoribus apice, 
tibiis tarsisque ferrugineis ; fronte clypeoque fulvo-aureo- 
pubescentibus ; thorace segmentoque mediano dense fulvo- 
pubescentibus ; segmentis dorsalibus 4 basalibus apice late 
argenteo-pubescentibus ; area pygidiali rufescente-pilosa ; alis 
pallide fulvo-hyalinis, venis testaceis, 
3. Femine similis. 
Long., 2 17-20 mm., ¢ 18 mm. 
