New Australian Tabanicfae. 21 



differently shaped antennae, though in this last respect the series 

 shows some variation. Females are harder to distinguish, as 

 a rule, however, the callus is longer and narrower than in T. regis- 

 georgii. Great variation is shown in this respect; in some the 

 callus is as broad as in many specimens of T. regis-georgii; in 

 most, however, it is narrower and more elongate, while in some 

 it is almost linear, and very different from the very broad rounded 

 callus of many specimens of v T. regis-georgii. In general the 

 Tasmanian species is darker, and more* hairy than the mainland- 

 one, of which it is the island representative. 



Types in Australian Museum (presented by G. H. Hardy). 



Tabanus imperfectus, Walk. 



Walker, List. Dipt. 1, p. 179 (1848); Ricardo, Ann. Macq.. 

 Nat. Hist. (8), XVI., p. 278 (1915); White, Roy. Soc. Tas- 

 mania (Papers and Proc), 1915, p. 11. 



Mr. Hardy's collection contains six specimens of this species - 

 from Hobart. Miss Ricardo states that Walker's type was from 

 New South Wales ; Walker himself, as noted by White, merely 

 gave the habitat as New Holland, but as White has compared 

 the Tasmanian specimens with the type, their identity is cer- 

 tain. I have never met with the species' among the numerous 

 specimens of Theriopleetes I have had under examination from 1 

 the mainland. The hairs are long and white on the eyes, much 

 as in T. antccedens, and the large frontal callus combined with 

 the small size will enable the species to be readily identified. In 

 some specimens there is evidence of slight shading of the trans- 

 verse veins of the wing. 



Tabanus hobartiensis, White. 



Roy. Soc. Tasmania, Papers and Proc, 1915, p. 13. 



Specimens collected by Mr. Hardy at Hobart in December and 

 January may belong to this species. They, however, all differ 

 in some details from White's description; thus the forehead is 

 slightly narrower at the vertex than anteriorly, the thoracic 

 pubescence is golden rather than white, and the knees, though 

 blackish, could hardly be described as " broadly black." The 

 anal cell also is not closed right in wing margin, but is united' 

 to it by a short stem which, however, varies in length. 



As the specimens are, however, from the type locality of 

 T. hobartiensis, I prefer to leave them under that name until a. 

 specimen can be compared with the type. 



