Tabanidse of the Australian Region. 275 



The following species I have not been able to identify : — 



Tabanus nigriventris , Macq., from Sydney Island, the type 

 of which is apparently lost, probably belongs to this group, 

 as the author speaks of the eyes being toinentose. 



Tabanus brevivitta, <$ , Walker; this type is not to be 

 found in the Brit. Mus. Coll., and should be deleted from 

 the list. 



Tabanus macrophthalmus, $ , Schiner. 



Tabanus gregarius and Tabanus esculaus, Erichson, both 

 from Tasmania, cannot be identified from the descriptions ; 

 they may be synonyms of Tabanus circumdatus , Walker. 



Tabanus bifasciatus, Macq. Hist. Nat. Dipt. i. p. 201 (1834), 

 is not known to me ; the type is apparently lost. It is 

 described as having the first posterior cell of the wing 

 closed, a characteristic not met with in any of the described 

 species of Tabanus from this region, which inclines one to 

 think it might be a species of the Pangoninse division. It is 

 described as black, with small white indistinct spots on the 

 abdomen. Wings brownish, the veins shaded, the centre of 

 the cells nearly hyaline. 



Length 20 mm. (10 lines). 



No mention is made of the eyes, which are probably bare. 



Tabanus microdonta, ? , Macq. Dipt. Exot., Suppl. ii. p. 33 

 (1846). 



Type (female) from Tasmania, and another female from 

 New Holland (M. Serville Coll.). 



This type in the late Mr. VerralPs Coll. is in fair preserva- 

 tion, as is the other female ; they are distinguished by the 

 frontal callus, which is large, with no lineal extension, but 

 extends as a broad stripe nearly three-quarters of the length 

 of the forehead, ending in an obtuse point. There is also 

 no appendix present on the wings in either female. A 

 blackish species, with some reddish colour on the abdomen. 



Length 13-15 mm. 



Face covered with brownish-grey tomentum and with 

 brown hairs. Beard brown, a few white hairs below. Palpi 

 small and not very stout, about the same width throughout, 

 ending in a short point, dirty yellow in colour, with rather 

 numerous black hairs. Antenna blackish, but the first two 

 joints and the base of third reddish ; the latter has hardly 

 any angle representing a tooth on its upper side, the first 

 two joints with black hairs. Forehead same colour as face, 



