188 Annals of the South African Museum. 



Cervical region very long and narrow. Mesonotum pale greyish- 

 yellow with a sparse whitish bloom, most distinct on the scutum. 

 Pleura yellowish with a sparse white bloom. Halteres pale. Legs 

 yellowish, the tips of the femora slightly brownish, tips of the tibiae 

 narrowly blackened ; apical tarsal segment brownish. Wings milky 

 grey or white, veins brown, those along the costa more yellowish ; 

 anal[angle square, prominent. Venation : Costa incrassated near the 

 end of R ; R ending nearly opposite mid-length of the deflection of 

 B 4 + 5 ; Rs straight or even slightly convex ; R.-, + s very weak, tending 

 to atrophy ; r present, a little more than its own length beyond the 

 fork of Rs ; r-m longer than the petiole of cell Jf 3 , but shorter than 

 the basal deflection of Cu^ ; basal deflection of Cu^ inserted slightly 

 beyond the level of the fork of Rs, the fusion of Gu^ and M s being a 

 little shorter than the deflection of -R 4 + 5 . 



Abdominal tergites brownish-yellow, the segments with broad 

 posterior margins of dirty silvery. 



Habitat. South Africa. 



Holotype, <?, Komati Poort, Eastern Transvaal, November, 1918 

 (E. W. Tucker). 



Paratopotypes, 3 <$ . 



Type in the South African Museum. 



The paratypes represent a greyish-brown dimorphic form in which 

 the entire body is much darker than in the type described. A very 

 similar condition is found in the related genus Antocha. 



This tiny species differs from the much larger genotype, O. alpigena, 

 Mik (Austrian Alps), in general coloration, the lack of a stigma and 

 in the venational details, i.e. the slightly convex radial sector, r far 

 proximal of r-m; the long basal deflection of R 4 + r> and fused portion 

 of Cttj + M, and the shorter but more divergent branches that 

 enclose cell M 3 . 



GEN. ELEPHANTOMYIA, Osteu Sackeu. 



ELEPHANTOMYIA INSULARIS PSEUDOSIMILIS, sub-sp. n. 



General coloration dark with a grey pruiuosity ; legs dark brown ; 

 wings greyish with a heavy brown pattern along the cord and outer 

 end of cell 1st M 2 . 



Sex ?. Rostrum 6'5 mm. ; wing 7 - 8 mm. ; head and thorax com- 

 bined 2*6 mm. ; fore legs femur 6'7 mm., tibia 9 mm. 



Rostrum long and slender, dark brownish-black, including the small 

 mouth-parts and palpi. Antennae black, the first flagellar segment 

 paler, brown ; the enlarged conical first segment of the flagellum is 



