708 DIPTERA OF AUSTRALIA, 



125. SCIARA UNICA, .sp.n. 



(J. — Length of antennae 0060 inch ... 1 -.54 millimetres. 



Expanse of wings 0095 x 0-040 ... 2-39 x 1-01 



Size of body 0-085 x 0-012 ... 2-14x0-30 



Antennae slender, about three-fourths thelength of thebody, black 

 with a dense pale pubescence ; joints of the scapus black, very 

 sparsely haired; flagellar joints sub-sessile (minute pedicels percepti- 

 ble towards the tip) 2 to 3 times as long as broad, the terminal joint 

 longer and more slender. Head black, levigate. Eyes contiguous 

 above. Palpi yellowish. Thorax black, levigate, with three 

 longitudinal single rows of very short golden-yellow hairs, running 

 nearly parallel to one another ; also a few scattered short golden- 

 yellow hairs on the lateral margins before the origin of the 

 wings, and on the scutellum. Halteres cinereous, tlie base of the 

 stem ochraceous ; club sparsely covered with very short hairs. 

 Abdomen slender, black, sparingly clothed with some moderately 

 long pale hairs ; forceps rather elongate, not so wide as the 

 terminal abdominal segment. Coxee and femora ochraceous; tibiae 

 and first joint of the tarsi ochraceous-brown, the remaining joints 

 black. In all the legs the tarsi a little longer than the tibise, 

 about \ longer in the fore-legs. Spurs pale yellow, shorter than 

 the fourth tarsal joiut. First joint of the tarsi nearly 2^ times 

 the length of the second ; second joint i longer than the third, and 

 as long as the fourth and fifth together ; third joint J longer than 

 the fourth ; fifth joint a little longer than the fourth. Wings 

 pellucid, with a somewhat fuliginous tint, costal and two first 

 longitudinal veins fuliginous ; uiargaritaceous reflections. First 

 longitudinal vein reaching the costa a short distance before the 

 base of the fork, and opposite the tip of the posterior branch of 

 the fourth longitudinal ; petiole very indistinct, shorter than the 

 posterior branch of the fork ; branches almost equally arcuated at 

 the base, running nearly parallel for the greater part of their 

 length, divergent at the tips ; tip of the second longitudinal 



