848 DIPTERA OF AUSTRALIA, 



Q, Length of antennae 0*060 inch ... 1-54 millimetres. 



Expanse of wings 0-410 x 0-090 ... 10-41 x 2-27 



Size of body 0-400 x 0-040 ... 10-16 x I'Ol 



Head with a grey or yellowish-grey bloom ; rostrum, palpi and 

 antennae black or dark brown ; flagellar joints elliptical with very 

 short verticils. Thorax covered with a grey or yellowish-grey 

 bloom, traversed by three brown stripes ; intermediate stripe 

 terminating immediately before the suture ; lateral ones shorter, 

 narrow, reaching beyond suture ; humeral pits black, shining ; 

 pleurse, scutellum and metathorax blackish-brown with a greyish 

 bloom. Halteres fulvous-yellow. Abdomen uniformly blackish - 

 brown, clothed with short light hairs ; ^ forceps of ordinary type, 

 concolorous with abdomen ; 9 ovipositor long, almost straight, 

 reddish-brown. Coxse and base of femora fulvous ; remainder of 

 joints usually uniformly dusky or blackish-brown, sometimes darker 

 at the tips. Wings pellucid with a very pale brown tint, yellowish 

 at the base ; costal cell and inner ends of sub-marginal, discal and 

 posterior cells, origin of prgefurca, great-cross vein and tips of all 

 the veins more or less distinctly clouded with brownish ; veins 

 dark brown ; stigma pale. Auxiliary vein reaching first longitu. 

 dinal vein opposite inner end of first sub-marginal cell, connected 

 a short distance from its tip by a cross-vein to costa ; prsefurca 

 moderately long, arcuated at base or angulated (sometimes with a 

 short stump of a vein), otherwise straight ; petiole of first sub- 

 marginal cell very short, only about length of marginal cross- vein ; 

 inner end of first sub-marginal cell somewhat rounded ; marginal 

 cross-vein very pale and difiicult to distinguish, cutting the middle 

 of stigma, and situated scarcely nearer to tip of first longitudinal 

 vein than to inner end of first sub-marginal cell ; inner end of 

 second sub-marginal cell rectangular ; first posterior cell as long 

 or very slightly longer than second sub-marginal ; small cross- 

 vein curved ; discal cell usually a little wider at its distal end, its 

 inuer end somewhat before that of first posterior cell ; second 

 posterior cell half the length of third ; great cross- vein at 



