604 DIPTERA OP AUSTRALIA 



opposite or slightly beyond the inner end of the marginal cell ; 

 anterior branch of the third longitudinal at an angle of about 45°, 

 its base situated about mid-way between the tips of the first and 

 third longitudinal veins ; fork of the fourth longitudinal vein 2^ 

 times the length of the petiole, the latter in direct line with the 

 posterior branch ; sixth longitudinal vein very short and indistinct. 



Ilab. — Hogan's Brush, Narara Creek, near Gosford, N.S.W. 

 (Skuse). August. 



Obs. — Perhaps most nearly allied to P. monticola, Sk. It how- 

 ever difiers greatly in the venation of the wings ; and the antennae 

 are a little longer, 



467. Platyura Richmondensis, sp.n. 



(J. — Length of antennse 0'042 inch ... 1-06 millimetres. 



Expanse of wings 0-125 x 0-042 ... 3-16x1-06 



Sizeof body 0.150x0-025 ... 3-81x0-62 



Antennae about the length of the thorax ; dark brown, almost 

 black ; pubescence of the flagellar joints hoary when viewed at a 

 certain obliquity ; terminal joint with a very small nipple-shaped 

 projection. Hypostoma and proboscis dark brown. Palpi 

 yellowish-brown. Front dark brown or black. Thorax sordid 

 yellowish-brown, opaque, densely covered with short black hairs ; 

 lateral borders and scutellum setiferous ; pleurae and metanotum 

 brown or brownish. Halteres brown, the stem yellow. Abdomen 

 deep brown or black, the posterior half of second and following 

 segments ochraceous ; densely clothed with black hairs ; ^ forceps 

 ochraceous or sordid ochraceous. Fore coxae ochreous-yellow ; 

 intermediate and hind pairs brown, the intermediate pair tinged 

 with ochreous ; all with short black hairs in front. Femora 

 ochreous-yellow, densely covered with very s'lort dark hairs ; 

 tibiae greyish ; tarsi almost black. Tibial spu s black. In the 

 fore-legs the tibiae I longer than the metatarsus. Wings rather 

 shorter than the body, hyaline ; the apex clouded with pale 

 brownish, intensified into dark brown at tip of third longitudinal 



