1170 
DIPTERA OF AUSTRALIA, 
^ somewhat cylindrical at the base, rarely entirely cylin- 
dncal, always terminating in a forceps. Legs long ; femora 
somewhat thickened, shorter than the tibiie ; tibim spurred ; 
very small lateral spines ; one inner and two outer ranges, or the 
fore-tibiae without spines, and the hind pair with two ranges of 
lateral spines which are so small as to be only perceptible with a 
lens. Wings somewhat broad, base rounded off, as long as the 
abdomen or a little longer ; incumbent in repose ; microscopically 
pubescent. Costal vein extending beyond the tip of the second 
longitudinal vein, terminating some distance from the apex of the 
wing ; auxiliary vein ending in the costa, rarely broken-off, 
usually united to the first longitudinal vein by the sub-costal 
cross-vein ; anterior branch of the second longitudinal vein very 
short, ending either in the first longitudinal vein or in the costa ; 
third sub-marginal cell always with a veiy short petiole ; fifth 
longitudinal vein complete or incomplete. 
B. Anterior branch of the second longitudinal vein running 
into the costa. 
a. Fifth longitudinal vein reaching the postericrr margin. 
143. Platvura magxa. Walker. 
Platyura rnagna., Walker, List Dipt. Brit. Mus. 1848, Part I. 
p. 89. (Div. B. Meig. Dipt. pi. 8, f. 19 ; Mac. Dipt. i. 142.) 
Cinerea, ahdomine ferrugineo, segnientorum marginihus posticis 
fuscis, antennis nigris, pedihus fuscis, femorihus flavis, tihiis aprici 
Jlavo maculatis, all's subjlavis ajnce cinereis. 
Body grey; mouth yellow; eyes black; feelers black, compact, 
setaceous, slightly compressed, much shorter than the chest; 
abdomen ferruginous, rather long ; hind borders of the segments 
brown; legs dark brown ; thighs yellow ; a yellow spot at the tip 
of each shank ; wings slightly tinged with yellow ; their tips and 
the veins brown. Length of the body, 7 lines ; of the wings, 1 1 
lines. 
“ New Holland.” 
