166 Dr. C. P. Alexander on 



Rostrum yellow, brown in some specimens ; palpi dark 

 brown. Autenuse with the first scapal segment yellow, the 

 remainder dark brown. Front and anterior part of vertex 

 obscure \ellow; remainder of head dark brown. 



Mesonotum brown, the pleura obscure yellowish testaceous. 

 Halteres dark brown. Legs with the coxse and trochanters 

 yellowish t( staceons ; femora dark brown, -the tips rather 

 narrowly (11 mm.) wiiite; tibiiie dark brown, the bus s 

 narrowly (1*4 mm.) white, the tips rather broatUy (5-5*2 mm.) 

 white ; the broad brow n tibial band is about twice the pale 

 tip; tarsi white; foie femora with two delicate bristles a 

 short distance beyond the base. Wings grey ; stigma dark 

 brown ; cell Sc and wing-tip darkened ; indistinct seams 

 along cord and vein Cu ; veins dark brown. Venation : r on 

 jRg+g before the fork, a distance less than m. 



Abdominal tergites dark brown ; sternites obscure yellow. 



Hab. Uganda. 



Holoti/pe, 1^ , Mabira Forest, Kyagwe Country, altitude 

 4000 feet, August 12, 1920 {R. A. Dummer). 



Allotopohjpe, ? , August 10, 1920. 



Faratopottjpes, 2 J's, August 9, 1920. 



" Along a stream in forest.^' 



There can be lio doubt but that many African species of 

 Trentepohlia answer the brief characterization of T.frayillima 

 (Westwoo(l), Mr. Edwards informs me that the type of the 

 latter is not now in the Hope Collections in the Oxford 

 Museum and may no longer be in existence. The present 

 st)ecies differs from T. JrayiUima in the conspicuously larger 

 size and the coloration of the abdominal and thoracic 

 sternites. The degree of whitening of the tibial tips in 

 T. fragillima is not known, I take pleasure in naming this 

 fly after the collector, Mr. R. A. Dummer. 



Trentepohlia [Trentepohlia) nigricolor, sp. n. 



General coloration shiny black ; halteres yellow ; posterior 

 coxse testaceous yellow ; a single strong bristle on posterior 

 tibise before tips ; wings whitish snbhyaline, cross-banded 

 with brown, the centre of cell R^ P^le ; abdomen black, the 

 genital segment obscure reddish. 



Male. — Length 6 3 mm. ; wing 5'6 mm. 



Female. — Lengtii about G"5 mm. ; wing 5*7 mm. 



Rostrum, maxillary and labial pali)i dark brown. Antenna? 

 dark brown throughout; tlitgellar segments cylindrical. 

 Head dark grey; eyes of male large, the vertex between 

 them very narrow. 



