DIPTERA. 143 
Asitus TracuHatus, Mas. 
Niger, capite thoracisque vittis tribus fulvis, peetore cinereo, abdomine 
cinereo-fulva, antennis nigris basi ferrugineis, pedibus ferrugineis, 
tarsis nigris, alis subfulvis. 
Body black : head adorned with a tawny covering, clothed behind 
and beneath with pale yellow hairs, beset behind the eyes with a few 
blak bristles; crown black, clothed with a few black hairs and bristles ; 
face very convex, beset with black bristles towards the feelers, armed with 
many long whitish spines towards the epistoma: eyes black, slightly 
bronzed ; fore part nearly flat, its facets larger than those elsewhere: 
sucker clothed at the tip with short tawny hairs; palpi beset with black 
bristles: feelers black; first and second joints dark ferruginous, beset with 
black bristles; second much shorter than the first; third spindle-shaped, 
longer.than the first; bristle a little shorter than the third joint: chest 
black, clothed with short black hairs, beset on each side and behind with 
stout black bristles, adorned with three indistinct dark tawny stripes ; sides 
and breast tinged with gray: abdomen flat, black, with a grayish tawny 
tinge, much less than twice the length of the chest, clothed with very short 
black hairs, tapering from the base to the tip, which is shining and beset 
with black bristles ; hind borders of the segments armed on each side with 
black spines ; first segment beset on each side with a few hoary hairs and 
pale yellow spines: legs ferruginous, clothed with short black hairs, armed 
with black spines ; feet black ; claws dark ferruginous at the base; foot- 
cushions dark tawny : wings with a slight tawny tinge ; wing-ribs and veins 
tawny; poisers pale yellow. Length of the body 5}—6} lines; of the 
wings 10—12 lines. 
Van Dieman’s Land. 
Asttus Lycorius, Fem. 
Niger, thoracis vitlis tribus pectore abdominis segmentorum marginibus 
posticis ventreque canis, antennis pedibusque nigris, alis subcinereis 
apice obseurioribus. 
Body black ; head adorned with a tawny covering in front, whitish 
and thiekly clothed with white hairs behind and beneath; crown beset 
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