BY ARTHUR WHITE. 



273 



1913. 



This species can be distinguish ed easily from all the 

 described Australian species with the exception of B. nigrmns. 

 From B. aoris it is distin^'uished by the bristles on legs and 

 thorax being black instead of white {B. aoris, too, is a stouter 

 and more robust species) ; from B. pedanus by the black 

 instead of pale reddish tibiae; from B. hrachyptenis, which is 

 a much more brightly coloured species, and from B. fiigrinus, 

 by its black instead of red and black femora. From B. 

 nigrmns, however, to which it bears a close resemblance, a 

 few further distinctions seem to be desirable. B. iiigriims 

 was described by Miss Ricardo from Queensland specimens. 

 I have not any of these for comparison, but possess a Tas- 

 manian sjDecimen that seems to belong to the same species. 

 On comparing this with B. tristis I find the following distinc- 

 tions : — 



B. tristis, Sp. nov. 



Moustache yellow. 

 Abdomen with conspicuous 

 black bristles. 



Femora black. 



Posterior femora with one 



white bristle. 

 Bristles on fore tarsi black. 

 Wings brown. 



B. nigrinus, Ricardo. 



Moustache black and white. 

 Abdomen practically without 



bristles, the few on first 



segment white. 

 Femora red and black. 

 Posterior femora with bristles 



entirely black. 

 Bristles on fore tarsi white. 

 Wings hyaline, with tips 



shaded. 



Laphria, Meig. 



In Mr. G. H. Hardy's collection are two females of an un- 

 described species of Laphria. It is not quite a typical 

 Laphria, as the antennae are club-shaped, and the abdomen 

 bears lateral bristles, but as the remaining characters are 

 normal, it seems unnecessary to place it in a distinct genus, 

 more especially as the shape of the antennae varies in other 

 Australian species. 



Laphria davata, Sp. nov. 



Thorax dull black ; abdomen violet with white lateral 

 spots, and black lateral bristles ; legs entirely black ; wdngs 

 grey- brown. 



Length. Female, 15 mm. 

 ^ Locality. Perth, Western Australia. 



Female. Head greatly excised behind ; face silvery-grey ; 

 moustache large and bushy, composed of long black and 



