630 DIPTERA OP AUSTRALIA, 



than the first, somewhat setiferous at the apex ; flagellar joints 

 somewhat compressed from the side, densely covered with a minute 

 downy pubescence. Thorax ovate, highly arched, densely covered 

 with a short pubescence ; lateral and hind borders setiferous • 

 scutellum semi-circular, setiferous ; metathorax steep. Abdomen 

 slender, in the ^ with six, in the ^ with seven segments ; narrowed 

 at the base ; sub-cylindrical, a little compressed from the side ; 

 anal joint of the ^ large ; ^ ovipositor short, with two elongate 

 lamellae. Legs long and slender ; intermediate and hind femora 

 rather broadly compressed ; tibiae spurred, and having lateral 

 spines ; fore pair without spines, intermediate pair with a range 

 of small spines on the outer side, hind pair with two ranges of 

 tolerably long spines on the outer side ; metatarsus of the hind 

 tarsi with minute prickles. Wings longer than the abdomen, 

 oblong, with moderately rounded base, microscopically haired in 

 longitudinal rows.* Auxiliary vein very short, bent posteriorly, 

 ending in the first longitudinal vein; costal vein extending slightly 

 beyond the tip of the third longitudinal vein ; cross-vein situated 

 before the middle of the first longitudinal vein ; second posterior 

 cell with a short petiole, its inner end situate opposite that of 

 the submarginal cell ; tips of the fourth longitudinal fork some- 

 what divergent, especially the anterior branch ; branches of the 

 fifth longitudinal fork arcuated, the tips not divergent ; the fork 

 narrow, its inner end situated a little before that of the second 

 posterior cell ; sixth longitudinal vein long, incomplete ; seventh 

 longitudinal stout, long, and incomplete. 



Obs. — Allied to Brachydicrania, Sk., but distinguished from it 

 chiefly by the complete auxiliary vein and the length of the fork 

 of the fifth longitudinal vein. 



484. Synplasta annuliventris, sp.n. (PI. xix., fig. 10.) 



(J, — Length of antennae 0-055 inch ... 1'39 millimetres. 



Expanse of wings 0-125 x 0-047 ... 3-16 x M8 



Size of body 0-150x0-030 ... 381 x 0-76 



* As in Mycetophila and Brachydicrania. 



