16 THE DII'TERA-BRACIIYCERA OF TASMANIA, 



with short, depressed, pale yellow pubescence, which gives 

 it a sand-coloured appearance. Femora, except the apex, 

 black with white pubescence; apices of femora, the whole 

 of the tibiae, and first joint of tarsi, brownish-yellow ; 

 remaining tarsal joints brown ; the hind tibiae bear scat- 

 tered black hairs interspersed with dense shining white 

 pubescence. Wings large and clear, with the veins unu- 

 sually pale ; stigma light yellow-brown ; cubital fork with 

 a recurrent veinlet. 



The Tasmanian specimens of T. vetustus differ from 

 Walker's type, which is from Western Australia, in hav- 

 ing the third antennal joint entirely black, instead of 

 reddish-yellow with only the tip black, but they agree 

 with it in all other respects. I have also seen a speci- 

 men from New South Wales, kindly sent me for examina- 

 tion by Dr. Ferguson, so the species seems to be of very 

 wide distribution. 



T. vetustus frequents sandhills on the coast, in which 

 situations its colouring is clearly protective. It occurs 

 during February, but does not seem to be common. 



Tabanus cyaneus, Wied. 



Syn. Tabanus cyaneoviridis, Macq. 



Abdomen metallic blue-black ; antenna? with first and 

 second joints black, third bright reddish-yellow ; face, 

 front, and legs black ; wings with the base brown, stigma 

 yellow. 



Length. Female, 13-14 mm. 



This species can be readily distinguished from all the 

 other Australian species of Tabanus by its shining metallic 

 blue-black colouration. A specimen was described by Mac- 

 quart from Tasmania, but I have not come across the 

 species personally. It also occurs in New South Wales 

 and Queensland. 



In addition to the foregoing, the three following spe- 

 cies of Tabanus have been described from Tasmania: — 

 T . exulans, Erichs, T. fraterculus, Man/., and T. gregarius, 

 Erichs; none of the types of these species can be traced, 

 and as the published descriptions are inadequate for pur- 

 poses of identification, it is necessary for the species to 

 be deleted. 



17. Chrysops, Meig. (Fig. 12c). 

 Black and yellow flies, with conspicuously banded wings. 

 Eyes joined in the male, separated in the female, usually 

 bare and spotted with brown or purple in a definite 



