24 



E. W. Ferguson : 



The callus in this species is inconspicuous, being little raised 

 and of the same colour as the frontal derm. 



Mr. Dixon informs me that the eyes are brilliant green in 

 life. 



From T. postponens, Walk., it differs in its much darker col- 

 oration and wider front. The difference in the forehead, colora- 

 tion of callus, antennae, legs, etc., will differentiate it from 

 T. bassii, sp. n. 



The Mallee specimen is larger than the type, measuring 13 

 mm. 



Type in National Museum, Melbourne. 



Tabanus regis-georgii, Macq. (Text figures, la, 2). 



Macquart, Dipt. Exot., 1, p. 132 (1838); Ricardo, Ann. Mag. 

 Nat. Hist. (8), XVI., p. 276 (1915); T. brisbanensis, Taylor, 

 Proc. Linn. Soc. New South Wales, XLIL, 3, p. 526 (1917); 

 id, XLIV, 1, p. 67 (1919). 



I am indebted to the authorities of the Queensland Museum 

 for a series (3 $ and 3 $ ) of 7\ brisbanensis. The females are 

 identical with females from New South Wales, and identified 

 as T. rcgis-georgii at the British Museum. 



E-'lG. 1. 



Text figure la. Tabanus rcgis-georgii, Macq,, $ antenna 

 and eye facets. 



The specimen from which this figure is drawn was sent from 

 the Queensland Museum under the name of T. brisbanensis, 

 Taylor. 



b. Tabanus dicmanensis, n. sp., cf antenna and eye facets. 



