BY FREDERICK A. A. SKUSE. 603 



vein joining the costa opposite the inner end of the marginal cell ; 

 petiole and base of fork less distinct than the rest of the fork ; 

 posterior branch of the fourth and anterior branch of the fork of 

 the fifth longitudinal vein not reaching the margin. 



Hah. — Sydney (Skuse). October. 



06s.— Most similar to P. conformis, Sk., from which it may be 

 distinguished by the colour of the thorax and intermediate and 

 hind coxpe, distinctly infuscated apex of wings, position of the 

 anterior branch of third vein, and the incomplete sixth longitudinal. 



4G6. Platyura gracilis, sp.n. 



(J' — Length of antennas 0'065 inch ... 1*66 millimetres. 



Expanse of wings 0-120 x 0-042 ... 3-04 x 1-06 



Size of body .. 0-140x0-020 ... 3-55 x 0-50 



Antennae longer than the thorax, slender ; joints of scapns 

 sordid ochreous ; flagellar joints 2-4 times as long as wide, the 

 terminal joint considerably longer than the penultimate ; dusky 

 brown or blackish, the pubescence hoary. Hypostoma, proboscis 

 and palpi brown or yellowish-brown. Front and vertex black or 

 sooty-brown. Thorax sordid yellowish-brown, ochreous at the 

 humeri, sub-levigate, with three longitudinal, slightly convergent, 

 rows of black hairs, the lateral rows double anteriorly ; lateral 

 borders and scutellum setiferous. Halteres brown, the stem sor- 

 did ochreous, pubescent. Abdomen yellowish-brown or brownish- 

 ochreous, the segments bordered posteriorly with sooty-brown or 

 blackish ; densely clothed with black hairs ; ^ holding forceps 

 sooty-brownish or blackish. Coxjb and femora ochreous-yellow ; 

 the former with black hairs in front ; tibiae cinereous ; tarsi black. 

 Tibial spurs black. In the fore-legs the tibiae somewhat longer 

 than the metatarsal joint. Wings rather shorter than the body, 

 pellucid, almost hyaline ; the costal and first two longitudinal 

 veins black or deep brown. Costal vein extending beyond the tip 

 of the third longitudinal vein slightly more than three-fourths the 

 distance from that to the tip of the anterior branch of the fork of 

 the fourth longitudinal vein ; auxiliary vein reaching the costa 



