Tabanldse of the Australian Region, 263 



reddish yellow, with some fine black pubescence. Antennee 

 same colour, the first two joints duller, with black hairs, the 

 third joint wide at base, with a slijjht angle, not longer than 

 the last tour divisions togetlier. Forehead the same colour, 

 parallel, about Hve times as long as it is broad ; the frontal 

 callus almost square, taking up the whole width of forehead, 

 shining blackish brown, with a lineal extension to the ocelli. 

 Eyes bare. Thorax mahogany-coloured, with some grey 

 tomentum ; scutellum and breast the same. Abdomen 

 reddish brown, darker at the apex ; traces of paler bands ou 

 the second and third segments. Leys reddish yellow. 

 Wings clear, with yellowish veins. No appendix. 



Silvius australis, $ , sp. n. 



Type (female) and a series of females from Stannary Hills, 

 N. Queensland, circa 3000 ft. (Dr. T. L. Bancroft), and a 

 series of females in German Eut. Museum from Kuranda 

 and Cairns, N. Queensland. 



A small brown species, the abdoinen with narrow grey 

 bands ; antennae dull reddish. Legs blackish. Wings 

 hyaline. 



Length 9 mm. 



Face covered with grey tomentum, a few white hairs on 

 cheeks. Beard white. Palpi long, cylindrical, more than 

 half the length of proboscis, slightly curved, reddish brown 

 or blackish. Antennce dull reddish, darker at apex, the first 

 two joints with black hairs, the first division of third joint 

 large, with an obtuse angle in place of tooth. Forehead 

 same colour as face, broader anteriorly than at vertex, so 

 that its length is only about double the width, measuring 

 from the widest part above antennse. Frontal callus 

 brownisli black, large, an elongated club-shape, the lower 

 end reaching the ocelli and ending in a short point. Eyes 

 bare. Thorax brown, with two distinct grey stripes, sides 

 also grey. Breast greyish. Scutellum brown, with grey 

 timientum. Abdomen brown or blackish brown, the poste- 

 rior borders of segments covered with grey tomentum, the 

 pubescence dark on the brown, white on the tomentose 

 borders ; underside almost wholly covered with grey 

 tomentum, the apex blackish. Legs blackish. IVings 

 hyaline, no appendix, veins and stigma brown. 



This species must be nearly allied to Silvius Silvester 

 (Bergroth), but in the description no mention is made of the 

 forehead and the antennae are described as blackish and the 

 abdomen with yellow-haired bands. The type came from 

 Central Queensland. 



