70 THE DIFTERA-BRACHyCERA OF TASMANIA, 



reduced; tlie wing tip clear of all veuation ; radial vein 

 absent; cubital vein sloping downwards, unforked, and not 

 reaching the wing margin ; discal vein indicated by two or 

 three more or less distinct veinlets that approach the 

 margin; postical vein fairly distinct; anal vein indistinct. 

 Squamae very large. 



i'his genus is of very wide distribution. It has not 

 hitherto been recorded from Tasmania, althouab two species 

 are known from the mainland of Australia — 0. basalis Walk, 

 from New South Wales and 0. doddl WaudoUeck from 

 Queensland. 



The four Tasmanian species are all of very infrequent 

 occurrence, and it is {)robable that other species remain to be 

 discovered. 



Tab!e of the Tasmaniait Species of Oncodes. 

 1. Veins of wing dark and prominently marked. 2 



1. Abdomen black with hind margins of segments white; 

 leiis black. nigrinervis, Sp. nov. 



Veins of wing faint. 3 



3. Abdomen black and yellow; legs partly or altogether 

 yellow. FLAVESCENS, Sp. nov. 



Abdomen black; femora black ; tibiae light brown. 



ATER, Sp. nov. 



Abdomen red-brown; femora and tibiae light brown ; very 



small species. pygm^eus, Sp. nov. 



Oncodes flavescens, Sp. nov. (Fig. 11.) 

 A vnry variable black and yellow species, with either the 



abdomen or legs extensively yellow; thorax black; wings 



hyaline with the veins faintly marked. 

 Length. Male, 5.5-8 mm! 

 Hab. Launceston, Bridiiort, Maugalore. 



Fig. 11. Wing of Oncode)< ^flavescens. 



M'lle. Head consisting chiefly of the eyes. Antennae very 

 -small, the arista black and yellow, thickened at the apex. 

 Thorax and scutellum black and shining, with abuiulant, 

 long, brownish pubescence. Abdomen l>lack and yellow; 

 first, segment black with a pale hind margin; second 



