DIPTERA. 211 



PsiLOPUS SUBLECTUS, Feui. 



Viridis, antennis nii/ris, pedibus fulvis, genuhus tarsisque piceis, alis sub- 

 cinereis. 



Green, tbickly beset with black bristles, adorned beneath with a 

 whitish covering : eyes bright red : mouth tawny : feelers black ; sixth 

 joint nearly as long as the chest : abdomen obconical, longer than the chest : 

 legs tainii/, clothed with very short black hairs ; knees and feet pitchy ; 

 wings slightly gray; wing-ribs and poisers tawny; veins black, tawny at 

 the base. Length of the body Inline; of the wings 3 lines. 



Van Diemen's Land. 



PsiLOPus GEMMARius, Plate 6, fig. 2. 



Genus MEDETERUS, Fischer. 



Medetercs EXUSTus, Fem. ^.^^^z'" 



Nigro-(en£us, capite antico viridi, abdomine purpureo-cupreo, antennis 

 pedibusgue nigris, fonoribus aneis, alis cinereis casta venarumque 

 marginibus fuscis. 



Allied to M. notatus. Bronze-black, beset with black bristles which 

 form a cross row behind the head, adoraed beneath with a whitish cover- 

 ing : head green in front, clothed beneath with black hairs; peristoma pro- 

 minent: eyes red; facets of the fore part rather large: feelers black: 

 abdomen obconical, coppery with a slight purplish tinge, not longer tlian the 

 chest : legs long, black, tbickly clothed with black down, beset with a few 

 black bristles ; thighs brassy, armed with black spines ; foot-cushions daik 

 tawny : wings darkish gray, very dark brown beneath the fore border and 

 along the bordeis of the veins in the disk ; wing-ribs and veins black ; 

 poisers dark tawny with pitchy knobs. Length of the body 2^ lines; of the 

 wings 6 lines. 



Bolton. North America. 



