396 DIPTERA OF AUSTRALIA, 



the length of the second ; second joint nearly ^ longer than the 

 third, and equal to the fourth and tifth combined. Wings pel- 

 lucid, with a grey tint, the costal and first two longitudinal veins 

 deep brown ; margaritaceous reflections. First longitudinal vein 

 reaching the costa a little before the base of the fork ; cross-vein 

 distinct, situated at the middle of the first longitudinal ; tip of 

 the second longitudinal vein and tip of the posterior branch of 

 the fork equally near the apex of the wing ; petiole paler than 

 the fork, as long as the posterior branch ; branches parallel, very 

 slightly divergent at the extreme tips, the posterior branch less 

 arcuated at the base than the anterior one. fg from \\ to 1^ 

 times the length of gh ; kl about I the length of Im. 



Eah.—lslo\mt Kosciusko, IST.S.W., 5000 ft. (Helms) ; two 

 specimens in Coll. Australian Museum. March. 



Ohs. — Closely resembling S. Jinitima, Sk., from which it may 

 be distinguished by its longer antennae, rather darker wings, &c. 



C. Cross-vein situated beyond 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 posterior branch of the fork. 

 f Thorax with two longitudinal rows of hairs. 



450. SciARA FLAVicoxis, sp.n. 



<^. — Length of antennae 0042 inch ... 1-06 millimetres. 



Expanse of wings 0-100 x 0-037 ... 2-54x0-90 



Size of body 0-100x0-016 ... 2-54x0-40 



Antennae black, slender, somewhat longer than the head and 

 thorax combined ; second joint of scapus brown ; flagellar joints 

 sub-sessile, all but terminal joint twice as long as bi'oad, the latter 

 slender. Head black, almost opaque. Eyes contiguous above. 

 Palpi black. Thorax black, nitidous, with two longitudinal 

 indistinct rows of black hairs, extending to the scutellum ; lateral 

 borders and scutellum with tolerably long black hairs. Halteres 

 black, the stem yellow. Abdomen deep brown, paler beneath, 



