Bombyliidae (Diptera) from Central Africa. 617 
biack hairs ; face with black hairs, with only a few pale hairs inter- 
mingled. Antennae black, of the same form as in the preceding. 
Thorax and scutellum velvety black, covered with golden tomentum, 
as in the preceding ; the hairs on the pleurae, however, are of a golden 
colour, not white. The abdomen has only the first segment black, 
and is, moreover, a little darkened at the tip. Halteres yellowish. 
Legs wholly orange-red, the tarsi darkened, with thin black bristles. 
Wings evenly and slightly darkened over their entire surface. The 
second vein is only gently curved at the apex, without the usual 
strong arcuate fold; upper branch of the third vein long, gently 
curved, without appendix; discal cell long and narrow; small 
cross-vein placed on the first fourth of discal cell, anal cell but little 
narrowed at the end. 
Tyre g, from Southern Nigeria, Benin City, March 20, 
1910 (J. J. Simpson) ; a single specimen. 
9. Molybdamoeba, Sack (1909). 
This genus is only slightly differentiated from the 
following one; but the species: has a particular facies, 
which seems to be sufficient for its distinction. In this 
genus is also notable the development and length of the 
recurrent veinlets of the wings. The wings are hyaline, 
with a few dark spots on the cross-veins and forks; the 
tibiae are yellow. The species in the collection can be 
distinguished as follows :— 
1 (2). Face with white hairs only ; anal cell closed 
lewcopogon, sp. n. 
2 (1). Face mostly or predominantly black-haired ; anal cell 
open. 
3 (4). Abdomen with very large scales towards the sides, com- 
pressed at the tip; pubescence of the body yellowish ; 
genital plate of male with black fringe ; all the cross- 
veins on the wings infuscated . puwncetipennis, Wied. 
4 (3). Abdomen without lateral patches of large scales, not com- 
pressed at the tip ; genital plate without a black fringe. 
5 (6). Ground colour of body grey; abdomen with yellow 
pubescence ; the yellow hairs in front of the thorax very 
long ; hairs on the face mostly yellowish 
incisuralis, Macq. 
6 (5). Ground colour black ; abdomen with the yellow pubescence 
very scanty; yellow hairs in front of the thorax 
sparse ; black hairs predominating on the face 
decipiens, sp. ne 
