190 Annals of the South African Museum. 



TRIBE ERIOPTERINI. 



GEN. EEIOPTEEA, Meigen. 

 SUB-GEN. EMPEDA, Osten Sackeu. 



ERIOPTERA (EMPEDA) BONAE SPEI, Alexander. 

 Two females from M'fongosi, Zululand, May, 1917 (W. E. Joues). 



ERIOPTERA (EMPEDA) CLAUSA, sp. n. 



Size very small, wing of the male 3 mm. ; general coloration 

 yellowish-brown ; wings subhyaliue ; cell 1st AT, closed, basal deflec- 

 tion of Cu l far beyond the fork of M. 



Male. Length about 2 mm ; wing 3 mm. 



Rostrum and palpi dark brown. Antennae brown, the flagellar 

 segments oval with moderately long verticils and a coarse white 

 pubescence. Head brown. Eyes with large, coarse ommatidia. 



Prouotum dark, the sides of the prouotal scutellum almost white. 

 Mesonotal praescutum dark brown, the broad lateral margins and the 

 humeral region somewhat brighter ; pseudosutural foveae large, con- 

 spicuous ; scutum with the lobes dark brown, the median area paler ; 

 scutellum projecting, dark brown, margined caudallywith dull yellow; 

 postnotum dark brown. Pleura dull yellowish, with two indistinct dark 

 brown stripes, one on either side of a yellowish line that extends from 

 behind the fore coxae to the base of the halteres ; sternum dull yellow. 

 Halteres very large, brown, the knobs dark brown. Legs with the 

 coxae and trochanters dull yellow ; remainder of the legs pale brown. 

 Wings with a faint darker tinge, the stigma pale brown, indistinct ; 

 veins dark brown. Venation : Sc rather short, ending before mid- 

 length of the sector, Sc, 2 almost at the tip of Sc l and subequal to it; 

 cell 1st M. 2 closed, rather long and narrow ; basal deflection of Cu v far 

 beyond the fork of M, at about two-fifths the length of cell 1st M.,. 



Abdomen dull brownish-yellow, the lateral margins darker brown. 

 Pleurites of the male hypopygium apparently with three slender 

 appendages ; outer appendage longest, shaped as a pale, flattened, 

 compressed arm that resembles the blade of a cutlass ; the second 

 appendage is somewhat similarly shaped but much smaller ; the third 

 appendage is heavily chitinised, slender, slightly bent, the tip acutely 

 pointed. The type is unique, and the structure of the hypopygium 

 can only be discussed in the general terms given above. 



^Habitat. South Africa. 



Holotype, 3 , French Hoek, Cape Colony, altitude 2500-3600 feet, 

 December 4th, 1916 (K. H. Barnard). 



