DIPTERA. 373 
and sides of the peristoma prominent: third joint of the feelers much 
longer than the second ; sixth black, extremely minutely pubescent, stout 
at the base, nearly thrice the length of the third: disk of the chest pitchy, 
with two yellow stripes on each side ; breast yellow witha pitchy disk ; hind- 
chest black: abdomen spindle-shaped, a little narrower but not longer than 
the chest, black towards the base: wings pale gray, with some brown spots 
along the fore border and with many colourless dots at the tips and along the 
hind borders ; disks almost colourless ; veins black, testaceous towards the 
base; middle cross-vein very slightly bent outward; cross-vein between 
the sixth and seventh veins angular, much bent inward ; lower cross-vein 
almost upright, with two slight curves, the lower inward, the upper out- 
ward: halteres tawny with pale yellow knobs. Length of the body 33 
lines ; of the wings 9 lines. 
Ortatis convormis, Mas. 
Viridis ; antenn@ fulve, articulo 30 apice piceo ; abdomen subcylindri- 
cum ; tarsi fulvi ; ale subhyaline. 
Ceroxys? Metallic-green: epistoma not prominent: feelers tawny ; 
third joint very long, slightly tapering, reaching the epistoma, pitchy to- 
wards the tip : abdomen almost cylindrical, very little longer than the chest : 
knees and feet tawny : wings almost colourless ; veins black: poisers pitchy. 
Described from an injured specimen. Length of the body 14 line; 
of the wings 3 lines. 
Van Dieman’s Land. 
Orrauis BAsAtis, Mas et Fom. 
Nigro-cyanea ; caput fuluum ; antenna lutee ; abdomen basi ferrugineum, 
foem. apice luteum attenuatum ; pedes fulvi ; ale hyalina, basi fulve, 
vitta antica interrupta fusca. 
Ceroxys? Blackish blue: head tawny ; face with a whitish covering ; 
epistoma prominent: mouth pitchy : feelers luteous; third joint much 
deeper than the second, and more than twice its length; sixth black, bare, 
very slender, more than twice the length of the third: abdomen longer 
3c 
