794 DIPTERA OF AUSTKALIA, 



Amer. lY. pi. i. f. 9), in Laving the marginal cross-vein more 

 remote from the tip of first longitudinal vein, and the great cross- 

 vein not quite so near the middle of the wing. 



317. Orimarga inornata, sp.n. 



^. — Length of antennae 0-040 inch ... 1-01 millimetres. 



Expanse of wings 0'200 x 0-040 ... 5-08x1-01 



Size of body 0-190x0-020 ... 4-81x0-50 



Head, including rostrum, palpi and antennae, black; head hoary; 

 rostrum about the length of the head. Thorax black, hoary. Hal- 

 teres pale yellowish, the club somewhat infuscated. Abdomen 

 deep fuscous-brown, somewhat shining ; ovipositor ochreous-brown. 

 Legs yellowish-brown ; tarsi darker. Wings narrow, micro- 

 scopically granulose, with a somewhat whitish appearance, weakly 

 iridescent ; veins pale ; stigma not visible. Auxiliary vein reaching 

 costa opposite a point somewhat before J the length of prgefurca ; 

 sub-costal cross-vein at tip of auxiliary vein ; first longitudinal 

 vein reaching costa opposite a point somewhat before tip of 

 posterior branch of fourth longitudinal, and at § the distance from 

 tip of auxiliary vein to apex of wing ; second longitudinal vein 

 originating at about middle of the length of wing ; prgefurca 

 moderately arcuated near its origin, nearly | the length of sub- 

 marginal cell ; marginal cross-vein in advance of small cross-vein 

 a distance equal to its length, and at a point mid-way between 

 inner end of sub-marginal cell and tip of first longitudinal vein ; 

 marginal and small cross-veins equal in length ; veins inclosing 

 first posterior cell considerably convergent towards their tips ; 

 inner end of second posterior cell a little before small cross-vein • 

 great cross-vein a little oblique, situated about mid-way between 

 origin of second longitudinal vein and inner end of sub-marginal 

 cell ; sixth longitudinal vein converging towards fifth longitudinal 

 at the tip. 



Hah. — Clifton, Illawarra District (Skuse). One specimen in 

 December. 



