BY FREDERICK A. A. SKUSE. 765 



cross-veins, inner end of suTj-marginal cells and origin of prsefurca, 

 darker greyish ; origin of praefurca together with a small portion 

 of first longitudinal vein and the tip of auxiliary vein often 

 stained with deep brown ; veins mostly sooty brown, the costa 

 and first longitudinal vein obscure testaceous. Auxiliary vein 

 reaching costa a little beyond origin of prsefurca ; sub-costal cross- 

 vein near its tip ; sub-costal cell uually very slightly wider at tip 

 of first longitudinal vein on account of a slight arcuation of 

 latter ; marginal cross- vein a little before tip of first longitudinal 

 vein ; prsefurca a little arcuated at base, about twice the length 

 of distance between origin of third longitudinal vein and small 

 cross-vein ; discal cell closed, twice as long as broad ; the great 

 cross- vein situated more or less before its inner end. 



Hah. — Sydney and Knapsack Gully, Blue Mountains ; July to 

 September (Masters and Skuse). 



Ohs. — I have five male and eleven female specimens before me 

 for comparison ; in one male specimen the wing-spots are entirely 

 absent. This species at first sight closely resembles D. puncti- 

 pennis. 



294. DlCRANOMYIA MARINA, Sp.n. (PI. XXI., fig. 3). 



^. — Length of antennae 0-030 inch ... 0-76 millimetre. 



Expanse of wings 0*250 x 0-060 ... 6-34 x 154 



Size of body 0-180 x 0-030 ... 4-56 x 0-76 



9- — Length of antennae 0-035 inch ... 0*88 millimetre. 



Expanse of wings 0-250 x 0-060 ... 6-34 x 1-54 



Size of body 0-210 x 0*030 ... 5-33x0-76 



Head brownish, the eyes approximate above ; rostrum, palpi 

 and antennae brownish ; rostrum a little longer than the head. 

 Thorax pale dull ochreous-yellow ; with three light greyish-brown 

 stripes ; posterior portion, withscutellum and metathorax having a 

 hoary bloom. Halteres pale ochreous or whitish. Abdomen dull 

 brown or brownish ; ^ forceps (PI. xxiv., fig. 43) and ^ ovipositor 

 ochreous or brownish-ochreous ; valves of the latter straight. Legs 



