700 DIPTERA OF AUSTRALIA, 



the tibise a little longer than the tarsi. Spurs shorter than the 

 fourth tarsal joint. First joint of the tarsi rather more than tAWce 

 the length of the second ; second joint longer than the third ; third 

 and fifth joints of about equal length and about i longer than the 

 fourth. Wings pellucid, almost hyaline, with a very pale yel- 

 lowish-Vjrown tint ; brilliant blue and purple reflections when 

 viewed in a certain light. Veins pale yellowish-brown. First 

 longitudinal vein joining the costa a short distance before the 

 base of the fork ; cross-vein distinct, considerably beyond the 

 middle of the first longitudinal ; petiole very pale and indistinct, 

 about the same length as the anterior branch of the fork ; 

 branches gradually separating as they proceed to the margin, 

 and slightly divergent at their tips ; posterior branch very little 

 arcuated, and very little nearer the apex of the wing than the 

 tip of the second longitudinal vein, fy about 2i times longer 

 than yh ; hi rather shortei' than hn 



Hah. — Sydney (Skuse). 



119. — SCIARA BREVIFURCA, Sp.n. 



5. — Length of anterma; 0.30 inch ... 76 millimetre. 



Expanse of wing.s 0-05.5 x 0-025 ... 1-39x0-62 



Sizeof body 0-050xO-0:5 ... 1-27x0-38 



Antennae slender, rather more than half the length of the body, 

 deep brown, almost black, with a short dense yellowish pubescence ; 

 joints of the scapus umber-brown, sparsely pubescent ; flagellar 

 joints a little longer than broad, the terminal joint nearly twice the 

 length of the one immediately preceding it. Head black, levi- 

 gate. Eyes almost contiguous. Palpi light umber-brown. Thorax 

 deep brown, levigate, with three longitudinal double rows of .short 

 yellowish -brown hairs, the intermediate one very indistinct 

 reaching only to about the middle, the lateral ones extending to 

 the scutellum, but not coalescent ; some moderately long hairs 

 between the origin of the wings and the scutellum, also a few on 

 the scutellum ; scutellum umher-brown. Halteres umber-brown, 



