[ 88 ] 
broad round patch of black scales, and on either side of this the scales are 
pale brown or a sort of drab ; there is a margin of pale scales along the 
eyes best seen with a hand lens. By altering the position with regard to 
the direction of the light the colour of the scales alter those in the centre 
showing a rose-purple tinge and the brown scales acquiring a silvery lustre.) 
Behind on the nape are several rows of dark-brown upright forked scales 
but these do not extend far forwards and as the head is set very close to 
the thorax they are sometimes difficult to see. When dry the dark scales 
lose colour and become brown. Vertical bristles pale-brown. Orbital 
dark-brown. 
Basal joint of antenna black, naked, all succeeding joints black, except 
where the verticils are inserted, with short white hairs; verticils black. 
Clypeus black and nude. Palpi entirely purple-black scaled rather short.' 
Proboscis purple-black scaled swollen at the end. 
Thorax .—Prothoracic lobes, prominent and black beset with numerous, 
black bristles and clad with a few broad white scales. Mesonotum dark 
grey to black, the anterior half clad with silky white narrov-curved scales 
on either side, and a band of bronze scales running ip the centre, 
sometimes as far as the anterior margin thus dividing the vhite scales into 
two large patches but in other specimens it stops short of this and the white 
scales are inserted along the whole anterior margin and forn with the two 
lateral patches a V-shaped patch. The posterior half of the mesonotum 
is clad with bronzy scales. Over the wing root is a line cf bristles dark 
brown almost black in colour. The patches of yellow scabs seen in the 
male appear to be absent on the posterior part of the emale thorax. 
Scutellum densely clad with broad flat black scales with tiuncated ends; 
scutellar bristles dark purple-brown. Wings brown, cove’ed with dark 
brown scales, linear lateral ones and rather long narrow meaan ones; fork 
cells moderately long of about equal width, base of second nearer wing base, j 
stem of first about two-thirds length of cell; supernumerary cross-vein j 
a little nearer base of wing than median, posterior cross-veii about twice 
its length from median. Pleurae almost black with a brownish tinge with 
patches of silvery-white scales. Fore and mid coxae dark brown, hind 
coxae paler brown; fore and mid femora with a few white scdes beneath 
with a pearly lustre the rest of the femur with the whole A the tibia 
and tarsi scaled with purple-black scales. In some specimeis the mid 
femora has a white patch of scales on its anterior face a little bebre its apex. ; 
Hind femora white beneath and laterally for about three-fourth heir length, 
scaled purple-black beyond; rest of the leg scaled purple-black. Fore and 
mid ungues equal minutely uni-serrate. Metanotum cheshut-brown. 
Halteres creamy-yellow stems and black heads. 
Abdomen .—Dorsally scaled with purple-black scales. On tie penulti¬ 
mate and antepenultimate segments the white lateral spots spread on to 
the dorsum and almost meet giving the appearances of a basal wiite band; 
laterally there are large square basal spots of white scales having a pearly 
lustre; ventrally there are broad white basal bands. 
Male Head .—Dark brown, clad entirely with flat scales an' upright 
forked behind. Under a hand lens the colour of these scales varis consi¬ 
derably according to the amount and position of the light at onetime all 
