BY FREDERICK A. A. SKUSE. 397 



rather densely clothed with short brown hairs ; ovipositor black, 

 the terminal lamellae very small, oval. Coxae and femora yellow, 

 the hind femora tinged with brownish. Tibiae and tarsi brown, 

 the terminal joints of the latter black. In the fore-legs the tibiae 

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

 about i longer than the tarsi ; (tarsi of hind legs lost). Spurs 

 short, brown. First joint of the tarsi 3 times the length of the 

 second ; second about ^ longer than third, and about equal to the 

 fourth and fifth taken together ; fifth joint somewhat longer than 

 the fourth. Wings pellucid, almost hyaline, with biilliant, chiefly 

 chalybeous, reflections ; costal and first two longitudinal veins 

 blackish-brown. First longitudinal vein reaching the costa a short 

 distance before the base of the fork ; petiole paler than the fork, 

 as long as or scarcely longer than the posterior branch of the fork ; 

 branches not divergent, but parallel at the tips, fg not quite 

 twice the length of gh ; kl a little shorter than bn. 



Hab. — Dunoon, Richmond River, N.S.W. (Helms). One 

 specimen in April. 



ft Thorax with three longitudinal rows of hairs. 



4.51. SCIARA EXPOSITA, Sp.n. 



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



Expanse of wings 0-140 x 0050 ... 3-55x1-27 



■ Size of body 0-135x0-022... 3-42x0-55 



Antennae black or deep brown ; slender, about half the length of 

 the body ; flagellar joints sub-sessile, about twice as long as broad. 

 Head black, almost opaque. Eyes contiguous above. Palpi 

 black or deep brown. Thorax black, almost opaque, with a 

 greyish bloom, and three longitudinal rows of extremely minute 

 hairs, the intermediate one most indistinct and not reaching the 

 scutellum ; lateral borders and scutellum with minute hairs, 

 Halteres entirely brown. Abdomen obscure fulvous, the terminal 

 segments black, clothed with short brown hairs ; in the middle as 

 broad as the thorax ; the lamellae of the ovipositor black, oval. 

 Legs deep umber-brown, the tarsi black. In the fore-legs the tarsi 



