220 Mr. F. Walker's Characters of undescrihed Diptera 



Helomyza robusta, 



Fcem. — Fulva, valida, arista nigra plumosa, pedibus testaceis, 

 tarsis piceis, alis luridis, apud marginem posticutn subcinereis, 

 venis fulvis. 



Female. — Tawny, stout, with a few black bristles ; arista black, 

 plumose ; abdomen a little paler than the thorax ; legs testaceous ; 

 tarsi piceous ; wings lurid, slightly greyish along the hind border ; 

 veins tawny ; discal transverse vein straight. 



Length of the body 2| lines ; of the wings 5 lines. 



Valley of the Amazon. 



Helomyza marginalis. 



Fcem, — Luteo-fulva, thorace cinereo vittis tribus fulvis, abdo- 

 mine fasciis nigris, femoribus tibiisque apice tarsisque nigris, 

 alis lurido-cinereis, venis fulvis apice nigris. 



Female. — Luteous tawny ; thorax with cinereous tomentum, 

 which is interrupted by three stripes ; abdomen with a slender 

 black band on the hind border of each segment ; tarsi and tips 

 of the femora and of the tibiae black ; wings grey, with a lurid 

 tinge, which disappears along the hind border ; veins tawny, black 

 towards the tips ; discal transverse vein straight. 



Length of the body 3^ lines ; of the wings 6 lines. 



New South Wales. 



Genus Dryomyza. 



Dryomyza cingulipes. 



Fcem. — Ferrugineo-fulva, proboscide antennisque nigris, abdo- 

 minis segmentis nigricanti-marginatis; femoribus, tibiis tarsis- 

 que apice nigris, femoribus tibiisque nigro-fasciatis, alis 

 cinereis. 



Female. — Ferruginous tawny ; proboscis and antennae black ; 

 abdomen shorter than the thorax, acuminated at the tip ; borders 

 of the segments blackish ; femora, tibiae and tarsi with black tips ; 

 femora and tibiae with a black band on each ; wings grey ; veins 

 black, tawny towards the base. 



Length of the body 4 lines ; of the wings 8 lines. 



New South Wales. 



