BIPTERA. 239 



black : legs tawny ; thighs and hind-shanks pitchy with tawny tips ; hind- 

 feet pitchy at the base and at the tips : wings slightly gray ; wing-ribs 

 tawny ; veins black, tawny at the base ; poisers tawny. Length of the 

 body 2^ lines ; of the wings 5 lines. 



Brazil. 



Syrphus Quintius. 



jEneus,jlavo varius, abdomine fidvo fasciis maculisque nigris omato, ati- 

 tennis pedibusqiie fulvis, alis limpidis. 



Head black : a yelloiv stripe on each side of the head icidening towards 

 the front which is all yellow ; hind part tinged with gray, clothed with 

 hoary hairs : eyes red : feelers tawny : chest and breast brassy ; a yellow 

 stripe on each side of the chest; scutcheon yellow ; a yellow band on each 

 side of the breast: abdomen tawny, elliptical, longer and much broader 

 than the chest, black at the base and at the tip, adorned with black bands 

 on the hind borders of the segments ; a pair of black dots on each of 

 the third and fourth segments, and a single one on the fifth segment ; these 

 dots vary in size, and when much developed are triangular, and are 

 connected by little black stripes, with the borders of the segments in front 

 and behind them ; sides of the segments sometimes mostly black : legs 

 tawny ; tips of the feet black : wings colourless ; wing-ribs tawny ; veins 

 black, tawny at the base and along the fore borders ; poisers lawny. 

 Length of the body 2\ lines; of the wings 5 lines. 



North America. 



Syrphus Fortius, Mas. 



jEiieo-viridis, thorace maculis flavis ornato, abdomine fulvo vario, pedibus 

 ftavis piceo nigroque variis, alis limpidis. 



Head wanting : chest and breast brassy green : a yellow spot on each 

 side and in front of the chest, and a yellow band on each side of the breast . 

 abdomen brassy, nearly linear, much longer than the chest ; a narrow taivny 

 spot adorns each side of every segment, and extends from the fore border 

 nearly to the hind border ; tivo more indistinct taumy rnarks in each of the 

 disks of the second and third segments: legs yellow ; four anterior-thighs 

 partly pitchy ; hind-thighs black, yellow at the base and at the tips; feet and 

 hind-shanks pitchy : wings colourless ; wing-ribs dark tawny ; veins black. 



