in the Collection of W. W. Saunders, Esq. 307 



nigricantibiis, pedibus nigris, alis cinereis, venis nigris, alulis 

 albis, halteribus testaceis. 



Cinereous, setose : head white, somewhat depressed above ; 

 frontalia black ; face obHque ; antennae not near reaching the 

 epistoma ; second joint ferruginous ; third about twice the length 

 of the second ; abdomen with blackish bands on the hind borders 

 of the segments ; legs black ; wings grey ; veins black ; prse- 

 brachial vein forming an obtuse angle at its flexure, joining the 

 cubital vein at a little in front of the tip of the wing ; discal trans- 

 verse vein oblique, almost straight, parted by a little less than its 

 length from the border, and by much more than its length from 

 the praebrachial transverse vein ; alulae white ; halteres tes- 

 taceous. 



Length of the body 2^ lines ; of the wings 4 lines. 



New S outh Wales. 



Sub-Fam. D EX IDES. 



Genus Dexia, Meig. 



Dexia pertecta. 



Nas. — Cinerea, capite albo, frontalibus atris, proboscide longo 

 nigro geniculato, palpis fulvis, antennarum articulo 2" rufo, 

 arista nuda, thorace vitiis angustis indistinctis nigris, abdo- 

 mine lanceolato, maculis dorsalibus trigonis nigris, pedibus 

 testaceis longis, tibiis posticis tarsisque nigris, alis cinereis 

 longis angustis, costa venisque fuscescente nebulosis, vena 

 prsebrachiali angulum perobtusum fingente, vena discali 

 transversa undulata. 

 Male. — Cinereous: head white, vertex cinereous in some 

 aspects ; frontalia deep black, widening slightly in front ; epis- 

 toma rather prominent ; proboscis long, black, geniculated ; palpi 

 slender, tawny ; antennae black, not reaching the epistoma ; second 

 joint red ; third slender, linear, more than twice the length of the 

 second ; arista slender, tapering, nearly twice the length of the 

 third joint; thorax with slender indistinct black stripes; abdomen 

 lanceolate, much longer than the thorax, with a black triangular 

 spot on each segment, and with a few black spines towards the 

 tip ; legs testaceous, long, slender ; tibiae darker than the femora ; 

 tarsi and hind tibiae black ; wings cinereous, narrow, very long, 

 brownish in front and along the veins ; veins black, testaceous at 

 the base ; praebrachial vein forming a very obtuse angle at its 

 flexure, hardly curved from thence to its tip, which is hardly in 

 front of the tip of the wing ; discal transverse vein undulating,^ 



