BY ARTHUR WHITE. 99 



two lateral black stripes; bristles on anterior half of 

 thorax black, extremely short, on posterior half of thorax 

 long and mostly white ; scutellum gi'ey, with two weak 

 white terminal bristles. Abdomen black, with hmd- 

 margius of segments yellow-brown, the sides with white 

 and yellow bristles, the latter being especially long on the 

 hindmargins of the fourth abdominal segment ; genitalia 

 somewhat swollen, and bearing short ulack bristle-iike 

 pubescence. Legs with femora bright orange, with apex 

 black, the black colour being carried back stripe-like on 

 the outer sides, so that, viewed from in front, the femora 

 are almost half black, whilst, viewed from behind, they 

 are bright orange, with only the apex black ; tibiae 

 bright orange, with apex black ; tai-si black, with 

 the fii-sb joint brownish ; femora with black ajiical 

 and pre-apical bristles, and, also, on the lower surface, 

 with long white hair-like bristles ; tibite and tarsi witn 

 black bristles. Wings tinged witli brown, particularly 

 along the costal margin ; the mediastinal and subcostal 

 veins brown, remaining veins black; the cubital fork not 

 eontiacted, and spread out as it reaches the wing-margin ; 

 second posterior cell waved both above and below. Halterea 

 orange-brown. 



Female resembles the male, but the black stripes on 

 the outer side of the orange posterior femora extend from 

 base to apex, the abdominal lateral bristles are much 

 shorter, and the abdomen is produced into a long narrow 

 ovipositor ; the abdomen consists of seven segments, in ad- 

 dition to the ovipositor. 



This species is easily distinguished from all the other 

 known species of RlKthdntoitannts by the bright orange 

 femora and tibiae, in conjunction with the white thoracic 

 bristles. Specimens of the female, taken at Leura, 



N.S.W., and of the male, taken at Roseville, Sydney, on 

 Febru^y 20, 1916, have kindly been sent me by Dr. 

 Ferguson. 



RH.\BDOTOrTAMUS CRA MINIS, White. 



Svn. Xeoitanius (jrnminis. White. 



This species is at present only known with certainty 

 to occur in Tasmania, where it seems to be generally rare. 

 It resembles R. rulntirux, but may be distinguished by the 

 femora being distinctly striped, instead of having only 

 the base yellow, and bv the wings having the cubital fork 

 more widely open on the wing margin, and by the broad- 

 er and less sinuated second posterior cell. It occurs 

 amongst long grass on high ground. 



