40 Mr. R. E. Turner on 
sexes are slightly more yellowish at the base, and the galea 
is distinctly shorter and broader, being scarcely more than 
half as long as the scape, whereas in inexorabilis it is nearly 
as long as the scape. 
Length, ¢ 11 mm., 2? 12-14 mm. 
Hab. Nyasaland, Mlianje (S. A. Neave), January and 
February. 
There are only five spines on the basal joint of the fore 
tarsus, in which character it agrees with 7. disputabilis, but 
the apical segments of the male are much broader than in 
that species. ‘The male has only four spines on the basal 
joint of the fore tarsus. 
48. Tachytes lachests, sp. n. 
9. Nigra; tibiis anticis basi extremo, calcaribus, tarsisque arti- 
culis apicalibus fusco-ferrugineis ; alis hyalinis, pallidissime 
flavidulis, venis ferrugineis ; fronte clypeoque aureo-pubescenti- 
bus; thorace segmentoque mediano griseo-aureo-pubescentibus ; 
segmentis dorsalibus 4 basalibus fascia apicali subargenteo- 
pubescente ; area pygidiali fusco-ferrugineo-pubescente. 
Long. 13 mm. 
-¢. Clypeus very broadly rounded at the apex; galea 
much shorter than the scape ; vertex microscopically punc- 
tured in the middle, with a few larger punctures near the 
eyes, which are separated on the vertex by a distance equal 
to the combined length of the two basal joints of the 
flagellum. Basal joint of the fore tarsi with six spines; 
spur of the hind tibia longer than the basal joint of the 
hind tarsus. Median segment scarcely longer in the middle 
than the scutellum, with a shallow, but distinct longitudinal 
sulcus. Sternites 3-5 shining, with large sparse punctures, 
smooth at the base, Pygidial area broadly rounded at the 
apex. bees 
Hab, Nyasaland, Mlanje (S. A. Neave), February. --. 
49. Tachytes megera, sp. vu. 
2, Nigra; tarsis subtus, articuloque apicali supra, calcaribusque 
ferrugineis ; tegulis testaceis ; alis basi flavidulis, apice hyalinis, 
venis ferrugineis; fronte clypeoque argenteo-pubescentibus ; 
thorace segmentoque mediano albido-pubescentibus ; segmentis 
dorsalibus 4 basalibus fascia apicali griseo-argenteo-pubescente ; 
area pygidiali fusco-ferrugineo-setosa. 
Long. 13 mm, 
¢ . Clypeus broadly subtrunecate at the apex, the apical 
~ 
rar vee 
