in the British Museum. 111 
with two large, rounded, black spots ; lateral sclerites of the 
postnotum white, almost surrounded by a U-shaped black 
mark. Pleura whitish ; a very large, mirror-like black spot 
that covers almost all of the mesepisternum and the cephalic 
margin of the mesepimeron. Sternum with the sides reddish 
brown. Halteres dark brown, the extreme tip of the knobs 
indistinctly pale. Legs with the cox pale reddish yellow ; 
trochanters yellow; femora brownish black, the bases 
obscure yellow, narrowest on the fore legs, broadest on the 
posterior legs ; tibie dark brown, passing ‘into black at 
the tips ; tarsi black. Wings greyish, the costal cell con- 
colorous; subcostal cell and stigma brown; wing-apex 
slightly infumed; veins dark brown; a group of about 
twenty-five macrotrichize in the end of cell R;. Venation : 
cell M, short-petiolate to subsessile ; fusion of Cu, and M 
before the fork of the latter longer than r—m. 
Abdomen orange; first tergite black; tergite two with 
about the apical third black ; segment three with about the 
apical half black; segments four and five with a small 
median black spot, smaller on the last segment ; segments 
six and seven black, the lateral margins of the former 
broadly reddish ; hypopygium orange. Male hypopygium 
with the ninth tergite having a deep median notch, the sub- 
median lobes thus formed small, light yellow, covered with 
a pale pubescence ; lateral lobes of the tergite moderately 
long, the proximal and ventral faces spiculose. Eighth 
sternite black, margined caudally with reddish yellow, the 
median area rather deeply notched, the surface covered with 
long conspicuous yellow bristles. 
Hab. West Africa. 
Holotype, 3 , Bo, Sierra Leone, April-May, 1910 (Dr. H. E. 
Arbuckle). B.M. no. 1910. 247. 
Paratype, 3, Ikotekpene, Southern Nigeria, May 17, 
1910 (J. J. Simpson). B.M. no. 1915. 58. , 
‘lype in the collection of the British Museum (Natural 
History). 
The paratype has the flagellar segments a little shorter, 
but shows no other essential differences from the type. 
Nephrotoma nigeriensis, sp. n. 
Antenne with the scape obscure reddish ; first flagellar 
segment reddish brown ; flagellum black ; head obscure 
orange-brown ; mesonotal prescutum yellow, with three 
black stripes ; median stripe paler than the lateral stripes ; 
