22 E. W. Ferguson: 



Tabanus bassii, sp. n. (Plate II., Fig. 4). 



A small dark species with elongate frontal callus, not reach- 

 ing the eyes. 



2 Long, 10 mm., width across head 4 mm., wing 9 mm. 



Face black, densely covered with yellowish grey tomentum,. 

 and with long dark pubescence intermixed with a few sparse 

 yellowish hairs; beard creamy. Palpi slender, little thickened. 

 at base, pale yellowish brown, clothed with cream pubescence 

 below and with dark hairs above. Antennae black, first joint. 

 with a few sparse black hairs, third joint rather strongly widened. 

 at base, angulate above, annuli as long as rest of joint. Sub- 

 callus black, shining where denuded, clothed with dense yellow- 

 ish grey tomentum. Forehead moderately narrow, very 

 slightly narrowed at vertex, clothed with dense dark grey tomen- 

 tum, with a distinct yellowish tinge, and with short black pubes- 

 cence longer on vertex ; callus elongate, narrow, about one-third- 

 width of forehead, tapering above, and with a lineal extension to 

 middle. Eyes clothed with dense brownish pubescence. 



Thorax black, shoulders grey, with rather sparse pale creamy 

 decumbent pubescence, and longer erect black hairs; sides pos- 

 teriorly, with tufts of creamy pubescence; shoulders with long; 

 black hairs; pleurae dark grey, with intermixed creamy brown: 

 pubescence. Scutellum black, , grey at sides, fringed with long 

 pale creamy pubescence. 



Abdomen black, first segment brownish yellow at sides, second 1 , 

 segment brownish -yellow at sides and along each margin, seg- 

 mentations margined with same colour; clothed with decumbent 

 black pubescence, the segmentations with creamy, almost pale 

 golden pubescence, dilated to form a series of median triangular- 

 spots on the segments. Venter black, with lighter segmentations,, 

 covered with yellowish grey tomentum, and with creamy pubes- 

 cence most dense on the segmentations. 



Legs with femora black, tibiae reddish brown, the anterior 

 darker at apex, and tarsi dark reddish brown, the anterior black 

 femoral pubescence long, creamy, posterior tibial fringe rather- 

 short, regular, black, a few pale hairs intermingled. 



Wings hyaline, veins brown, very faintly margined with light, 

 brown, stigma brown, conspicuous ; appendix present. 



Hab. : — Victoria, Wilson's Prom. (Prof. Sir Baldwin Spen- 

 cer) ; Macedon (J. E. Dixon, 17/2/17) ; Gippsland, Forrest (EL 

 W. Davey) ; Tasmania, Wynyard (G. H. Hardy). 



