BY AUTHUK "WHITE. 103 



by the bristles of the tibiae and tarsi being partly yellow 

 instead of altogether black. From R. miatiijes it is dis- 

 tinguished by the scutellar bristles being black instead 

 of yellow, and from R. hrunneu.^ by the wholly black 

 antennse and the well-marked abdominal segmentations. 



Should any doubt of its position arise on account of 

 a few white thoracic bristles being present, R. lautus can 

 bs distinguished at once from R. volaticus, R. gra minis, 

 and R. claripes by the scutellar bristles being black in- 

 stead of white or yellow. 



Of this species I swept two males from long grass at 

 Fern Tree Gully, Victoria, on December 16, 1914, and 

 another male from Warburton District, Victoria, has been 

 kindly sent me by Mr. Spry. The female is at present 

 unknown. 



