in the British Museum. 21 



Holotype, £ , Mabira Forest, Chagwe, altitude 3500- 

 3800 ft., July 16-25, 1911 {S. A. Neave). B.M. no. 1913. 

 140. 



Type in the collection of the British Museum (Natural 

 History). 



Dicrcmoptycha atricolor may be confused only with the 

 much smaller D. natalia, Alexander (Natal), which is readily 

 told by the paler body-coloration, the yellow trochanters, 

 and the different venational details as outlined above. 



Genus Rhamphidia, Meigen. 

 Rhamphidia iris, sp. n. 



Rostrum very long and slender, nearly as long as the 

 he;id and thorax taken together ; head grey ; mesonotal 

 prsescntum and scutum shiny black, remainder of the 

 thorax orange-yellow ; coxae and trochanters black ; wings 

 iridescent, the apex and stigma brown ; abdomen black, 

 the last segment (in the female) orange. 



Female. — Length (excluding rostrum) about 8 mm.; wing 

 7 mm. ; rostrum 2 mm. 



Rostrum very long and moderately slender, nearly as long 

 as the combined head and thorax, dark brown, the short 

 brown palpi at the tip. Antennas dark brown throughout, 

 the flagellar segments oval. Head dark, heavily light grey- 

 pruinose ; eyes large, the vertex between them very narrow. 



Cervical sclerites dark brown. Pronotum orange-yellow, 

 the anterior margin a little darkened. Mesonotal prsescutum 

 and most of the scutum shiny black, the posterior margins 

 of thescutal lobes, seutellum, and postnotum orange-yellow. 

 Pleura and sternum orange-yellow. Prosternum rather 

 broad and extensive, narrowed anteriorly. Halteres black, 

 only the extreme base of the stem yellowish. Legs with the 

 coxae and trochanters black, contrasting conspicuously with 

 the light-coloured pleura; remainder of the legs broken. 

 Wings subhyaline, highly iridescent, the costal and subcostal 

 cells a little darker ; wing-tip ui cells R x to M z darkened ; 

 stigma oval, dark brown ; veins dark brownish black. 

 Venation (a single wing preserved in the unique type) : 

 Sc ending opposite the end of Rs, Sc 2 at the end of -Scj ; 

 Rs long, almost straight ; basal deflection of R i+5 about 

 equal to m ; cell 1st M 2 closed ; basal deflection of Cu x a 

 little beyond mid-length of the cell 1*/ M 2 . 



Abdomen black, the genital segment orange. Ovipositor 



