616 DIPTERA OF AUSTRALIA, 



Genus Acrodicrania, Sk. 

 Acrodicrania, Sk., I.e., p. 1194, pi. xxxii., figs. 10-lOa. 



477. Acrodicrania angustipurca, sp.n. 



$. — Length of antennse 0*045 inch ... 1*13 millimetres. 



Expanse of wings 0*125 x 0*045 ... 3*16x1*13 



Sizeof body 0*1*20x0020 ... 3.04x050 



Antennae moderately slender, about the length of the head and 

 thorax combined ; joints of the scapus and base of the first flagellar 

 joint yellow ; flagellar joints brown, with a minute hoary pubes- 

 cence. Hypostoma dark brown. Palpi yellow. Front dark 

 brown or black. Thorax brown, more yellowish at the humeri, 

 levigate, densely covered with long and short brown hairs ; pleurae 

 and metathorax dark brown or blackish. Halteres clear yellow. 

 Abdomen dark brown or black, the segments (? first two) with 

 almost the anterior half yellow, clothed with brown or blackish 

 hairs ; lamellae of the ovipositor deep brown. Coxae and femora 

 yellow, the hind femora deep brown or black at the apex ; tibiae 

 yellowish-grey ; tarsi dusky, the metatarsal joint lighter. Tibial 

 spurs yellow ; the lateral spines black. In the fore-legs the tibiae 

 |- longer than the metatarsal joint ; the tarsi about | longer than 

 the tibiae. Wings pellucid, with a very pale greyish tint ; an 

 indistinct fascia of pale brownish near the tip, immediately before 

 the tip of the third longitudinal vein, disappearing before the 

 posterior margin ; veins dark brown. Auxiliary vein joining the 

 costa before the inner end of the first posterior cell ; first longitu- 

 dinal vein joining the costa considerably beyond the base of the 

 fork ; the cross-vein opposite the latter ; costal vein extending 

 beyond the tip of the third longitudinal vein -^ the distance from 

 that to the tip of the anterior branch of the fork ; fork of the 

 fourth longitudinal vein rather narrow, the branches running 

 almost parallel towards the tips; the tips pale; rudimentary sixth 

 longitudinal vein and a short stump of seventh longitudinal vein 

 present. 



