BY FREDERICK A. A. SKUSE. 399 



the tarsi a little longer than the tibiae ; in the hind-legs the tibiae 

 very slightly longer than the tarsi. Spurs very short, honey- 

 yellow. First joint of the tarsi in the fore- and intermediate-legs 

 2^ times the length of the second, in the hind-legs very slightly 

 more than 3 times the length ; second joint ^ longer than the 

 third, and equal to the fourth and fifth taken together ; the latter 

 two of equal length. Wings pellucid, with a pale greyish tint 

 and brilliant reflections ; the costal and first two longitudinal 

 veins deep brown or blackish. First longitudinal vein joining 

 costa a short distance before the base of the fork ; cross-vein 

 distinct ; petiole paler than the fork, a little shorter than the 

 posterior branch ; posterior branch very slightly bent at its base, 

 nearly straight ; branches parallel, scarcely divergent at the 

 extreme tips, fg somewhat longer than gh ; Id somewhat shorter 

 than Idx. 



Hob. — Dunoon, Richmond River, N.S.W. (Helms). April. 



Ohs. — Closely related to S. frequens, Sk. 



V). Tip of the second longitudinal vein and tip of the posterior 

 branch of the fork eqtially near the apex of the wing. 

 t Thorax with two longitudinal rows of hairs. 



453. SCIARA MARGINATA, sp.n. 



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



Expanse of wings 0-180x0-065 ... 4-56xl-66 



Sizeofbody ....• 0-160 x 0-035 ... 4-06x0-88 



Antennae black, densely covered with a pale pubescence ; as 

 long as the head and thorax combined ; joints of the scapus 

 moderately haired ; flagellar joints sub-sessile, twice as long as 

 broad, the terminal joints longer. Head black, levigate. Eyes 

 almost contiguous above. Palpi black. Thorax black, sub- 

 nitidous, with two longitudinal rows of short black hairs extend- 

 ing to the scutellum ; some long hairs on the lateral borders and 

 scutellum. Halteres black, the base of stem dusky brown. 

 Abdomen black, sub-levigate, densely clothed with short black 

 hairs ; as broad as the thorax ; lamellae of the ovipositor black 



