20 THE DIPTERA-BRACHYCERA OF TASMANIA, 



beard of abundant long white hairs. Front olive-black. 

 Antennae with first joint dark grey-brown, second and 

 third deep black; the first two joints bear long black 

 hairs. Palpi brownish-black, the second joint unusually 

 slender and a little longer than the first. Proboscis black, 

 long, and jirojecting forwards. Thorax and scutellum 

 olive-black, the former with three clearly-defined 'light 

 grey stripes, the dorsum bearing dense black pubescence, 

 the shoulders with black hairs, and posterior margins and 

 scutellum fringed with long white hairs. Abdomen deep 

 violet-brcwn ; the first segment deep brown in centre and 

 reddish-brown at sides, remaining segments dark violet- 

 brown with paler hindmargins, that of the second segment 

 distinct and fringed with short white and yellow hairs. 

 those of the remaining segments indistinct, the whole 

 bearing a row of white centre-spots. Legs entirely deep 

 brown, but the knees beneath are a light yellow-brown. 

 Wings hyaline, the cubital fork without a recurrent 

 veinlet. 



This species is distinguished from all the other Tas- 

 manian species of Diatomineura (except D. aurifiud) by 

 the black antennae ; from D. atiriflua it is distinguished 

 by the abdomen being violet-brown with white spota 

 instead of black with golden spots. It is also quite dis- 

 tinct from any of the mainland species. 



D. ianthina is only known from a single specimen, which 

 occurred settled on the blossoms of a flowering shrub on 

 the highest part of the hills that bound the Bagdad 

 Vallev on its eastern side. It was taken on January 

 26, 1912. 



Diatomineura constans, Walk. 



Syn. Pangonia ruficornis, Macq. 



A common, very variable species. Antennae bright red, 

 thorax deep brown, with three grey or yellow stripes ; 

 abdomen orangei, golden, brown, or tawny, with or with- 

 out a broad black dorsal stripe, and with indistinct whitish 

 centre-spots; femora yellow, tibiae yellow-brown; wings 

 with the costal margin tinged with brown. 



Length. Female, 11.5-12.5 mm.; male, 11 mm. 



Length of proboscis, 3 mm. 



Hab. Tasmania (generally distributed). 



Female. Front black, dusted partly or completely with 

 grey tomentum. Antennae with the two first joints grey, 

 with long black hairs, third bright red. Palpi orange, 

 the second joint concave above, broad at the base and 



