4(3 TIIK DIPTBRA-BRACHYCERA OF TASMANIA, 



thoracic stripes more distinctly marked, and the wings 

 frequently paler. These may possibly represent distinct 

 species, but I am unable t<> find any satisfactory distinc- 

 tion between them. The femora may be entirely black, 

 or else may have the apex reddish. 



The only other known Tasmanian species with black 

 femora are A. helvenacus, A. passus, and A. latifrons. 

 From the first of these A. terrenus is distinguished by 

 having the wings brownish instead of yellow, by the larger 

 size, the more robust build, and the darker tibiae ; from 

 A. passus by the costal margin of the wings being without 

 any conspicuous dilatation; and from A. latifrons by the 

 brown instead of black thorax, and the brown instead of 

 black and white front. 



A. terrenus occurs somewhat commonly on the sandhills 

 at Bellerive, also somewhat more sparingly in the bush 

 in inland districts. My dates range from November 22 

 to March 13. 



Anaearrhynchus passus, Sp. nov. (Fig. 23). 



A medium-sized robust species, distinguished by the 

 shape of the wings. Costa of wings conspicuously inflated ; 

 frontal spots wanting; thorax grey-brown, indistinctly 

 siriped; abdomen black, with hindmargins of second, 

 third, and fourth segments, and the whole of fifth and 

 sixth segments, white (<J) or yellowish-white ( 9) ; femora 

 entirely black; tibia; yellow, with apex black. 



Length. Male, 8.5 mm. ; female, 9.5-10.5 mm. 



Hab. Bagdad Valley. 



Fig. 23. Wing of Anabarrhynchus passvs. 

 Male. Face yellowish-white. Front brown, or grey 

 above ami brown below, cither altogether without, or with 

 faint indications of, frontal spots, the whole covered with 

 Ion- black hairs. Antennas with first joint grey, bearing 

 black hairs, second and third black. Thorax lighl grey- 

 brown, with three indistinct pale brown centre stripes; 

 prescutellar bristles wanting. Abdomen with first seg- 

 ment brown, second, third, and fourth black with broad 



