BY FREDERICK A. A. SKUSE. 679 



Antennae black, with a short yellowish pubescence; rather 

 longer than the head and thorax together ; joints of the scapus 

 with very little pubescence ; flagellar joints sub-sessile, 2 to 2| 

 times as long as broad, densely pubescent. Head black, 

 levigate. Eyes almost contiguous above. Palpi deep brown, 

 Thorax black, levigate, Avith two longitudinal and almost 

 parallel rows of short brown hairs, extending almost to the scu- 

 tellum, also some moderately long hairs along the lateral margins 

 from the humeri; humeri slightly tipped with reddish-brown; 

 scutellum with some moderately long hairs. Halteres entirely 

 umber-brown, sprinkled with short hairs. Abdomen deep umber 

 with the last two joints black, densely covered with a moderately 

 long bi'own pubescence ; as broad as the thorax ; lamellae of the 

 ovipositor black, densely pubescent, elliptical. Coxa3 black or very 

 deep brown, with some rather long hairs on the front. Femora, 

 tibiae and tarsi deep umber-brown, densely pubescent. In the fore 

 and intermediate legs the tarsi somewhat longer than the tibiae ; in 

 the hind legs the tibiae and tarsi of equal length. First joint of 

 the tarsi 3 times the length of the second ; second joint ^ longer 

 than the third and considerably shorter than the fourth and fifth 

 together ; tliird and fifth joints of about equal length, and longer 

 than the fourth. Wings pellucid with a greyish-brown tint, the 

 costal and two first longitudinal veins deep umber-brown ; 

 brilliant roseous and smaragdine reflections when viewed at a 

 certain obliquity. First longitudinal vein reaching the costa 

 almost opposite but immediately before the base of the fork of the 

 third longitudinal ; petiole paler than the fork and rather shorter 

 than the posterior branch ; posterior branch shorter than the 

 anterior one, very little arcuated at the base ; both branches 

 slightly divergent at the tips. ^ about twice the length of gh; 

 kl about f the length of Im. 



Hah. — Elizabeth Bay and Middle Harbour (Skuse). September. 



06s.— In size, general appearance, and colour this species 

 greatly resembles S. Madeayi, for which at first sight it might 

 very easily be mistaken, but the length and narrowness of the 



