212 THE DIPTERA-BRACHYCERA OF TASMANIA, 



ond instead of on the third segment; the abdomen alsj 

 is rounder, and less flattened in appearance. Of the main- 

 land species the only one that ^4. velox resembles is A. 

 alhirufa, Walk, but in the latter species the brown colour- 

 ation of the wings is diffused from the base, instead of from 

 til© middle of the costal margin. 



A. velox occurs settled on the ground in sunny places, 

 and may also be found on box bloom; it flies w^itli great 

 rapidity. I have only met with it during Januaiy. 



Anthrax simplex, Macq. 



A small species. Wingsi hyaline with foremargin brown ; 

 pubescence at base of abdomen yellowish-white. 



Length. Male and femxale, 5-6 mm. 



Hab. Bagdad Valley. (Also in New South Wales.) 



Male and female. Face and front black, bearing short 

 golden pubescence. Thorax dark brown, with yellowish- 

 white or pale brownish-white^ anterior and lateral pube- 

 scence ; scutellurn dark brown. Abdomen dark brown, 

 with long yellowish-white or very pale brown hairs on 

 each side of the basal segmen.t: dorsum with short, de- 

 pressiod, white and yellow pubescence, forming white bands 

 on the anterior margins of the second and fourth seg- 

 ments, and yellow bands on the remaining segments. Legs 

 black. Wings hyaline, rather dull, with base and foremar- 

 gin brown. 



Variation. A female taken by myself at MangaloTe on 

 December 24, 1911, has three submarginal cells on the 

 right wing, and only two on the left. 



A. simijlex can be easily recognised by its small size, 

 and wings with the foremargin broadly brown. The only 

 other known small species having the wrings similarly col- 

 oured is A. argenfiiiennis, which is distinguished by having 

 the pubescence at base of abdomen bright silvery-white. 



A. siniyplex occurs commonl}'- in the Bagdad Valley during 

 December, and is probably generally distributed. 



Anthrax argentipennis, Sp. nov. 



AVings bright hyaline, with base and. foremargin deep 

 blackish-brown; abdomen with long silvery- white pube- 

 scence on sides of the first and second segments. 



Length. Mai© and female, 7-10 mm. 



Hab. Mangalore. 



Male. Head distinctly produced in front; face and 

 front black, with a little short golden pubescence. An- 

 tennae black. Thorax brownish-black, with light brown 



