BY G. F. HILL. 



459 



der mottled with brown and greenish; on the ventral side the first 

 segment greenish yellow, the remaining segments dark brown. 



£. Unknown. 



I lab. — Northern Territory: Darwin, 4th June, 1916. Type 

 unique. 



Subfamily SARGSIN/E. 

 Sargus gselli, n.sp. (Figs.6r«, 6/;, 6c). 



9. Total length, 7-5; wing, 6*0. 



Head, thorax and abdomen metallic peacock blue to metallic 

 eyanine blue, lower part of irons silvery, elypeus black, mouth 

 parts yellowish. 



Head wide (240), wider than prescutum (1-60) ; eyes bare; 

 antenna? pale rusty, arising from about the middle of the head in 

 profile; first and second joints about equal in length (10), 

 clothed with short stout hairs; third joint three times as long as 

 the first with two long hairs at apex; arista long (-90), terminal; 

 frons convex, -65 wide, increasing to -80 at vertex, almost hairless, 

 a (deft-like suture down median line from ocellar triangle to near 

 the insertion of the antennae. Ocellar triangle prominent, occupy- 

 ing about one-third of the width of the vertex; elypeus black, 

 almost hairless; proboscis stramineous. (Figs. 6a and 6b). 



Text-figs. 6«, &>. 

 Sargus gselli, n.sp., female. 



Thorax with fairly prominent humeral calli, nearly parallel 



