710 DIPTERA OF AUSTRALIA, 



length ; in the hind-legs the tibiee somewhat longer than the 

 tarsi. Spurs almost as long as the third tarsal joint. First joint 

 of the tarsi about 3 times the length of the second ; second joint 

 \ longer than the third and almost as long the third and fourth 

 together ; third joint J longer than the fourth and almost twice 

 the length of the fifth. Wings pellucid, with a very pale brownish- 

 yellow tint; veins pale brown; brilliant margaritaceous reflections 

 when viewed at a certain obliquity. First longitudinal vein 

 reaching the costa a short distance before the base of the fork, 

 and opposite to the tip of the posterior branch of the fourth 

 longitudinal vein ; cross-vein short and indistinct, just beyond the 

 middle of the tir.st longitudinal vein ; petiole very pale aud indis- 

 tinct, not quite as long as the anterior branch of the fork ; 

 branches running parallel for the greater part of their length and 

 slightly divergent at the tips ; posterior branch very little arcuated 

 at the base, fg aV)0ut twice the length of gh ; kl a little shorter 

 than hn. 



Hah. — Glenbrook (Masters). November. 



lL'7. SCIARA MOXTIVAGA. 



(J. — Length of antennae 0070 inch ... 1'77 millimetre.s. 



Expanse of wings 0-090 x 0-035 ... 2-27 x 0-88 



Size of body 0-080x0-012 ... 202 x 030 



Antennae slender, not quite the length of the body, deep brown, 

 with a dense pale yellowish pubescence ; joints of the scapus deep 

 brown, with very little pube.sceuce ; flagellar joints sub-sessile, 2 to 

 4A- times as long as broad, the terminal joint longer. Head black. 

 Eyes contiguous above. Palpi yellow. Thorax black, leWgate, 

 with three longitudinal double rows of short brownish-yellow 

 hairs, the intermediate row extending almost as far as the lateral 

 ones, these latter almost reaching the scutellum ; also some similar 

 hairs along the lateral margins and on the scutellum, interspersed 

 wdth a few long brown setaj. Halteres light brown, the base of 

 the stalk yellowish, sparsely covered with very short hairs. 



