258 THE DIPTKRA-UKACHYCERA OF TASMANIA, 



Hydropkorus cupreus, Macq. 



Copper-coloured, with green reflections; abdomtn with 

 segmentations white ; legs yellow ; wings clear, with a 

 yellowish tinge. 



Length. Female, 4 mm. 



Hab. "Tasmania." 



In Macquart's figure of the wing the discal vein is given 

 as converging apically towarc's the cubital vein. 'The 

 species is iinknown to me. 



Family XI. PHORID.E. 



Very small flies, with a peculiar venation, the wings 

 having two strong anterior veins, reaching only half-way 

 to the tip, and three or four faint veins running diagonally 

 across the wing. 



Head rather small, about, the same breadth as the 

 thorax, the vertex usually bristly. Eyes separated in 

 both sexes. Antennse short, the third joint concealing 

 the other two, and bearing an apical or dorsal arista. 

 Thorax large, and greatly arched, with, usually, posterior 

 bristles. Abdomen rather short, the genitalia of the male 

 often large, of the female small and projecting. Legs 

 rather stout, femora large ; tibiae frequently with a few 

 bristles, and spurred ; posterior tarsi lengthened. Wings 

 usually large and broad, but sometimes wanting ; three 

 longitudinal veins present, the first very v^eak. and partly 

 coalesced with the second ; the second strong and always 

 simple ; the third very strong, either simple or foiked, or 

 with the apeix thickened, and extending to about the 

 middle of the costa; three or four light veins also present, 

 extending diagonally from the third vein to the hinder 

 margin; costa with the basal half usually bristly. 



This family seems to be very poorly represented in 

 Australia, only five species having so far been described. 

 One of these is a curious, wingless form, discovered by Lea 

 in an ants' nest in Victoria, and described by him under 

 the name of Euierimorplin ahclominalis. In Tasmania only 

 one s|>ecies is at present known to occur. 



65. A p IT I o c H JE T A (Fig. 52). 



Ant.erior frontal setae proiclinate; middle tibiae devoid 

 of any setae near the l^ase ; wings with the basal part of 

 costa bristly, and the third lono-itudinal vein forked. 



