4 



BY FREDERICK A. A. SKUSE. 631 



9. — Length of antennae 0*050 inch ... 1-27 millimetres. 



Expanse of wings 0-125 x 0-047 ... 3-16x1-18 



Size of body 0-150x0-030 ... 3-81x0-76 



jj and 9- — Antennae slender, as long as the head and thorax 

 combined ; joints of the scapus yellow ; flagellar joints pro- 

 gressively diminishing in thickness, brown, with a minute hoary 

 pubescence. Front yellowish-brown. Hypostoma and palpi pale 

 yellow. Thorax yellowish-brown, opaque, densely covered with 

 short brown hairs ; lateral borders with black setfe ; pleurae 

 ochreous, with brownish callosities ; scutellum and metanotum 

 brown or yellowish-brown, the former with black setaceous hairs. 

 Halteres yellow, with brownish club. Abdomen dark brown, all 

 the segments bordered posteriorly with yellow ; clothed with dark 

 brown or black hairs ; ^ forceps brownish-ochreous, densely beset 

 with black hairs ; ^ ovipositor and lamellae brown. Legs long 

 and slender. Coxee and femora yellow, the latter slightly darker 

 on account of a microscopic pubescence ; femora yellowish- 

 cinereous, with brown spurs and black spines ; tarsi black or 

 blackish. In the fore-legs the tarsi three times the length of the 

 tibiae ; the metatarsal joint a little longer than the tibiae. Wings 

 pellucid, with a yellowish tint ; brilliantly iridescent ; veins 

 brown. First longitudinal vein joining the costa considerably 

 before the tip of the posterior branch of the fork of the fourth 

 longitudinal vein ; petiole of the fork very short ; inner end of 

 the second posterior cell situated opposite that of the submarginal 

 cell ; tips of the branches of the fork of the fifth longitudinal 

 vein not divaricate ; the fork narrow, arcuated, its inner end 

 situated a little before that of the second posterior cell, and about 

 opposite the middle of the cross-vein ; sixth longitudinal vein 

 reaching beyond the base of the fork of the fifth longitudinal 

 vein ; sixth longitudinal vein stout, incomplete. 



Hah. — Berowra, N.S.W. (Masters and Skuse). September. 



