56 ~ Dr. C. Pv Alexander on > - 
brown, a broad, almost black median area ; lateral margins of 
the sclerite narrowly paler. Pleura dull yellow. Halteres 
brown, the knobs darker, the base of the stem yellow. Legs 
with the cox. dull yellow, the fore coxz more brownish on 
the outer face; trochanters dull yellow; remainder of the 
legs dark brown, the last four tarsal segments and the extreme 
tips of the metatarsi dull orange-yellow. Wings subhyaline ; 
cell Sc, a seam beneath vein Ou, and the wing-apex a little 
darker; stigma elongate-oval, dark brown; veins dark 
brown. The following veins bear conspicuous macrotrichize :— 
Rs, apical part of Be Ry,3, all of Ry,5, apical portions of 
M,,. and M3,43; one near mid-length of the last section 
of Cu, and a few on Cu. Venation: Sc ending beyond 
the fork of Rs, Sc. at the tip of Se; ; basal deflection of 
Ry,5 about equal to rm; basal deflection of Cu, at or 
beyond the fork of MZ. 
. Abdominal tergites dark brown ; sternites yellow, more 
darkened on the sixth and seventh segments; hypopygiuin 
brownish yellow. : 
The female is similar to the male in most respects, the 
ovipositor with the valves very long and slender, the tergal 
valves almost straight, a little upeurved at the tips ; ; sternal 
valves acicular, the tips with a few long hairs. 
flab, West Africa. 
Holotype, 8, Lolodorf, Cameroun, January 10,1919 (J. A. 
Reis). 
Allotopotype, 9 , January 15, 1919. 
Parat: potypes, 10 3 ¢, January 9-16, 1919. 
Trentepohlia (Mongoma) albilata, sp. n. 
Legs with the femora tipped with white; tibie with a 
narrow white basal band, the apices very broadly white; fore 
femora with three basal bristles, the other femora with a 
row of from eight to ten small sete; wings with two or three 
long curved sete on the posterior margin of the wing-petiole. 
Male (type).— Length 10 mm. ; wing 8:7 mm. ; fore leg, 
femur 13°5 mm., tibia 16°8 mm., tarsus 15°2 mm., black 
band on tibia 5 mm.; hind leg, femur 15 mm., tibia 16 mm., 
tarsus 13 mm,, black band on tibia 5 mm, 
Male (series).—Length 9-11 mm. ; wing 7-9 mm. 
Female (series).—Length about 9°5 mm.; wing 8 mm. 
Rostrum yellow; palpi brownish black. Antennze dark 
brownish black, pale at the extreme base, moderately elon- 
gated ; flagellar segments long-oval. Head dark grey along 
