768 DIPTERA OF AUSTRALIA, 



a little beyond origin of second longitudinal vein ; sub-costal 

 cross-vein situated before its tip a distance nearly equal to length 

 of stigma ; marginal cross-vein pale, situated at distal end of 

 stigma and tip of first longitudinal vein ; prsefurca arcuated, about 

 one-third longer than distance between origin of third longitudinal 

 vein and small cross-vein ; discal cell closed, the great cross-vein 

 at its inner end. 



Eah. — Generally distributed in N.S.W. (Masters and Skuse). 



Ohs. — In drawing up the above description I have a large series 

 of (nearly one hundred) specimens for comparison. Not a single 

 specimen has the discal cell open. 



297. DlCRANOMYIA OBSCURIPENNIS, sp.n. 



$. — Length of an cennse 0-065 inch ... 1-66 millimetres. 



Expanse of wings 0-250 x 0-065 ... 6-34 x 1-66 



Size of body 0-220 x 0-035 ... 5-58x0-88 



Head including rostrum, palpi and antennae black ; face 

 somewhat ochraceous-brown. Joints of antennae with very 

 short pedicels, becoming slender and elongated towards apex. 

 Thorax brown, sub-levigate ; lateral callosity of metanotum and 

 two hind pairs of coxae ochre-yellow. Halteres black, ochre- 

 yellow at base of stem. Abdomen dark brown, the ventral 

 segments bordered with ochre-yellow posteriorly ; ninth seg- 

 ment ochre-yellow ; forceps dark brown ; fleshy lobes rather 

 small, the rostriform appendage with two long erect bristles. 

 Legs black. Wings pellucid, with a blackish tint ; veins and 

 stigma dusky. Auxiliary vein extending beyond the origin of 

 second longitudinal vein half the distance to marginal cross-vein ; 

 sub-costal cross-vein near its tip ^"^ first longitudinal vein arcuating 

 into the second longitudinal vein, and connected by the cross-vein 

 to the costa ; marginal cross-vein and tip of second longitudinal 



*It is diflScult to tell which is the cross- vein and which the tip of the 

 auxiliary vein. 



