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, 

 tvith two yelloiu stripes on each side ; breast yellow with a pitchy disk ; hind- 

 chest black : abdomen spindle-shaped, a little narrower but not longer than 

 the chest, black toivards 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 3| 

 lines ; of the wings 9 lines. 



Oht.\lis conkormis, Mas. 



Viridis ; antenna; fitlvce, articulo 3o apice pieeo ; abdomen subcylindri- 

 cum ; tarsi fulvi; alie subhyalince. 



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 1^ line ; 

 of the wings 3 lines. 



Van Dieman's Land. 



Ortalis basalis, Mas et Fcem. 



Nigro-cyanea ; caput fulvum; antennfc lutcte ; abdomen basifcrrxigineum, 

 foem. apice luteum attenuatum ; pedes fulvi ; alee hyalina:, basifulvce, 

 vitta antica interrupta fusca. 



Ceroxys ? Blackish blue : head taivny ; 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 



3 c 



