404 DIPTERA OF AUSTRALIA, 



reaching scutellum ; lateral borders and scutellum with some long 

 hairs. Halteres wholly black. Abdomen as wide as the thorax, 

 black, sub-levigate, with short brown hairs ; forceps narrower than 

 the anal segment, black. Legs blackish-brown. In the fore- and 

 intermediate-legs the tai'si about ^ longer than the tibiae ; in the 

 hind-legs the tibiae and tarsi of equal length, nearly 5 longer than 

 the tarsi of the other legs. Spurs short, yellow. First joint of 

 the tarsi rather more than twice the length of the second ; second 

 4 to I longer than the third, and equal to fourth and fifth taken 

 together ; fourth and fifth of equal length. Wings hyaline, with 

 brilliant blue and violaceous reflections ; costal and first two longi- 

 tudinal veins dark brown. First longitudinal vein reaching costa 

 some distance before the base of the fork ; petiole veiy pale and 

 indistinct, a little shorter than the posterior branch of the fork ; 

 posterior branch nearly straight, only very slightly undulated ; 

 branches parallel for the greater part of their length, slightly 

 divergent at the tips, fg 4 times the length of gh ; hi slightly 

 shorter than Im. 



Hah. — Woronora, N.S.W. (Skuse). Eleven specimens in 

 September. 



Ohs. — This species I place between S. audax, Sk., and aS'. 

 vecors, Sk. 



2. Palpi yellow. 



B. Cross-vein situated at the middle of the first longitudinal 

 vein. 



a. Tip of the second longitudinal vein nearer the apex of the 

 wing than the tip of the 2>osterior branch of the fork. 



458. SCIARA PR^CELLENS, Sp.n. 



5. — Length of antennae 0-060 inch ... 1-54 millimetres. 



Expanse of wings 0-165 x 0-057 ... 4-18 x 1-44 



Size of body 0-110x0-025 ... 2.79x0-62 



Antennae dark brown or black, with a brownish pubescence ; 

 slender, longer than the head and thorax combined ; joints of 



