684 DIPTERA OF AUSTRALIA, 



In the fore legs the tarsi aV>out ^ longer than the tibiae ; in 

 the intermediate-legs the tarsi and tibiae of about equal length; 

 and in the hind-legs the tibiae somewhat longer than the 

 tarsi. Spurs about the same length as the last joint of the tarsi, 

 yellowish-brown. First tarsal joint rather more than twice the 

 length of the second ; the second \ longer than the third, and 

 almost as long as the fourth and fifth together ; fourth tarsal joint 

 somewhat longer than the fifth. Wings almost hyaline, having a 

 pale brownish tint, with brilliant reflections, in which blue pre- 

 dominates, when viewed at a certain obliquity. First longitudinal 

 vein reaching the costa a very short distance before the Ijase of 

 the fork. Petiole rather paler than the fork and shorter than the 

 anterior branch ; posterior branch considerably less arcuated at 

 the base than the anterior one, and almost in a line with the 

 petiole ; both branches veiy slightly divergent at the tips, fff 

 rather more than twice the length of gh ; kl a little shorter 

 tiian Im. 



Hub. — Elizabeth Bay, near Sydney (Skuse). December. 



106. SCIAKA FESTIXA, Sp.n. 



$. — Length of antenna? 0-040 inch ... 1-01 millim^res. 



Expanse of wings 0090x0-040 ... 2-27x1-01 



Sizeofbody 0-090x0-020 ... 2-27x0-50 



Anteuna3 pitch-brown, with a pale yellow pubescence; slender, 

 as long as the head and thorax together ; basal joints dull 

 castaneous, with a sparse but considerably longer jjubescence 

 than that of the flagellum ; flagellar joints sub-sessile, twice 

 as long as broad, with minute pedicels. Head black. Eyes 

 contiguous above. Palpi yellowish-brown. Thorax black, levi- 

 gate, with three double longitudinal rows of short hairs, 

 nearly meeting just in front of the scuttUuni, also some long 

 hairs between the wings and the humeri ; humeri tipped 

 with dull reddish-brown ; scutellum black, with numerous short 

 dispersed hairs. Halteres pitch-brown, the stem ochraceous, 



