376 DIPTERA OF AUSTRALIA, 



terminal two sub-globose, the last with a very minute nipple- 

 shaped process ; verticils short. Front black or deep brown 

 with yellow hairs. Face dull yellow. Palpi dark brown. Thorax 

 black, dull, with two longitudinal rows of yellow hairs ; lateral 

 borders with yellow hairs ; pleurae deep broM'n ; scutellum yel- 

 lowish-brown, with yellow hairs ; origin of wings ochreous or 

 yellowish-brown. Halteres black, reddish at base, the club 

 yellow. Abdomen reddish, all the segments with a broad band 

 of black scales, and a small patch of white scales at the sides. 

 Legs short and robust, black, the coxae with white hairs. Wings 

 rounded, densely covered with black hairs, the latter more dense 

 at the apex and forming a conspicuous black patch over the 

 posterior branch of the third longitudinal vein ; also the anterior 

 branch densely covered with the hairs ; violaceous reflection ; 

 veins black or deep brown. Costal and first longitudinal veins 

 very densely clothed with black hair.s, the latter vein joining at 

 about middle the length of wing ; second longitudinal vein nearly 

 straight, a little bent posteriorly at the tip, joining the margin at 

 the apex of the wing ; third longitudinal vein turning abruptly to 

 the posterior margin, hidden by the black hairs. (Description 

 drawn from fresh specimen). 



.ffa6.— Elizabeth Bay, near Sydney (Skuse). October. A 

 single specimen taken on a window. 



Obs. — Very distinct from any other described species known to 

 me, and easily recognized by the black cloud over the posterior 

 branch of the third longitudinal vein. 



Sub-genus Diplosis, Loew. 

 Diplosis, Loew, I.e., p. 68. 



A. Second longitudinal vein reaching the margin of the wing 

 at or before the apex. 



1. Flagellar joints of the antennae in the ^ alternately single 

 and double. (All ^'s with unspotted wings, the ^^'s not 

 being known, are located provisionally in this group). 



