212 Annals of the South African Museum. 



separation. The basal flagellar segments are a little pale at the tips ; 

 the median praescutal stripe distinctly split by a line of the ground- 

 colour ; tip of vein R 2 much better preserved to the wing-margin, etc. 



DOLICHOPEZA (TRICHODOLICHOPEZA) AUBANTIACA, sp. n. 



Head orange ; thorax orange with three indistinct brown stripes ; 

 wings greyish-yellow ; tip of vein R. 2 preserved ; tarsi brown. 



Male. Length 8'8 mm. ; wing 9'5 mm. 



Frontal prolongation of the head very short, dull yellow ; uasus 

 prominent. Palpi dark brown. Antennae moderately elongated, the 

 scape yellow, flagellar segments dark brown, the basal segments a 

 little paler at the tips. Head orange without distinct markings. 



Mesonotum brownish-orange, the praescutum with the median stripe 

 very indistinct, obliterated anteriorly, the lateral stripes pale. Pleura 

 orange-yellow. Halteres short, pale, the knobs dark brown, pale at 

 the extreme tips. Legs with the coxae and trochanters pale yellow; 

 femora dark brown, paler basally, almost black at the tips ; tibiae and 

 tarsi black. Wings suffused with greyish-yellow, the wing-apex a 

 little darker ; stigma large, elongate-oval, dark brown ; cord seamed 

 with pale brown ; a pale obliterative streak before the cord extending 

 into the base of cell M. A , and a similar but smaller area beyond the 

 stigma in the end of cell 2nd R l and the extreme base of jR 2 ; veins 

 dark brown. A heavy pubescence in the apical cells of the wings. 

 Venation (Plate IV, fig. 15) : tip of R 2 entirely preserved ; fusion of 

 If and Cu l a little shorter than the free portion of If beyond the fusion. 



Abdomen with the two basal tergites orange-yellow ; remaining 

 tergites orange-brown, with the caudal margins of the segments 

 narrowly ringed with dark brown ; sternites orange-brown, the apical 

 sternites dark brown basally. Male hypopygium with the tergal 

 region margined caudally with a horseshoe-shaped chitinised band 

 that is almost smooth except at the ends of the crescent, which are 

 enlarged and coarsely toothed. In the related D. hirtipennis the band 

 is irregularly and finely denticulate or roughened, and above the 

 median or dorsal portion of the crescent is a high, depressed, very 

 flattened ledge whose posterior margin is narrowly chitinised and 

 roughened. The penis-guard and the flattened pleural lobes that lie 

 ventrad of the outer pleural appendages are less conspicuous than in 

 D. hirtipennis. 



Habitat. South Africa. 



Holotype, <$ , Kranzkop, Natal, November, 1917 (K. H. Barnard). 



Paratype, $ , Maritzburg, Natal, 1917 (K. H. Barnard). 



Type in the South African Museum. 



