1762 
DIPTERA OF AUSTRALIA, 
long, brown ; Vjoth joints of the scapus covered with brown and 
white scales, those of the second overlapping the basal half of the 
third joint, so that these two appear to be one long robust joint. 
Head with a large patch of erect yellowish scales, covering the front, 
and surrounded laterally and behind with brown scales and some 
long brown hairs ; some white scales on the hinder border of the j 
eyes. Proboscis deep brown, somewhat spotted with white scales, 1 
with a ring of white in the middle and another rather broader one ! 
immediately before the terminal lobes. Palpi rather more than 4 [ 
the length of the proboscis, deep brown, the third joint dusted, 
with white scales and the last joint with a few white scales at 
the extreme apex. Thorax deep brown, densely covered with a 
mixture of brown and yellowish scales, interspersed with tolerably 
long brown hairs, three oblong patches of the yellowish scales 
arranged in a triangle, rather distinctly visible on the anterior 
portion of the thorax, the apical patch beginning below the anterior 
border, and the bases of the lower patches reaching a little below 
the middle of the thorax ; pleurae deep brown with irregularly 
dispersed white scales ; scutellum testaceous, with yellowish and 
brown scales and brown hairs ; metanotum deep brown. Halteres 
deep brown, the stem testaceous. Abdomen about the width and 
twice the length of the thorax, almost umber-brown where denuded, 
very densely clothed with bi own and white scales, the latter pre- 
dominating at the sides of the segments and underneath; segments 
fringed with long yellowish hairs. Legs slender. Coxae deep 
brown, with white scales. Femora, tibiae, and tarsi brown, 
thickly covered with very small white rings and spots, except 
that in the tarsi of the hind legs the whole of the third, and most 
of the fourth joint (except at the apex), purely white. In the 
hind-legs the tibiae | the length of the metatar.sus. Wings the 
length of the abdomen, hyaline, all the veins thickly beset with 
somewhat broad, more or less elliptical,* brown and yellowish 
* I have only seen the wing-scales of this shape in the present species ; it 
may be a peculiarity of the genus ; those of Megarrhina are more or less 
turbinate, whilst in Ctilex and A nopheles they are long and very slender. 
