BY ARTHUR WHITE. 95 



This genus is very widely distributed throughout the Palse- 

 arctic Region, Ceylon, the East Indies, North, Central, and 

 South America, and the West Indies, but it has not previously 

 been recorded from Australia. Those species in which the ocelli 

 are equidistant, have been placed in a separate genus (Chryso- 

 iiohis, Chrysochroma, or Chrysonotomyia), but it is doubtful if 

 the distinction is more than a specific one. The name Geosanjns 

 has been proposed in lieu of Saryus, on account of a fancied 

 preoccupation. 



Sargus meridionalis, sp.nov. 



Thorax metallic green; abdomen metallic golden-brown; legs 

 yellow ; wings with costal half brown, remainder hyaline. 

 Length, (^, 8 mm. 



Hab.—l^ew South Wales (Milson Island). 



Male. — Eyes bare, almost joined on the middle of the front; 

 anterior ocellus widely separated from the two, posterior ocelli, 

 which are close together. Face shining brown. Front coppery- 

 green, very narrow, posteriorly constricted in the middle by the 

 approximated eyes. Thorax bright metallic-green, with brownish 

 pubescence. Abdomen metallic-brown, with a golden tint, and 

 bearing a little, similarly coloured pubescence. Legs entirely 

 yellow. Wings with the costal half tinged with brown, re- 

 mainder hyaline; stigma brown; the four, posterior veins are 

 practically complete, though a little indistinct as they reach the 

 wing-margin. 



This striking species is, at present, known only from a single 

 specimen, which was taken by Dr. Ferguson, at Milson Island, 

 on January 30th, 1915. 



16. Acanthasargus White. 



Black or purple-black flies, with a two-spined scutellum. 



When this genus was proposed, only the female was known; 

 since then, however, .sevex'al specimens of the male have been 

 taken by Mr. Hardy and myself. The eyes are bare in both 

 sexes, joined in the male, widely separated in the female. 

 Antennae with the first two joints of almost equal length, third 



