DIPTERA. 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 24 lines ; of the wings 5 lines. 
Brazil. 
Syrpuus Quintius. 
Eneus, flavo varius, abdomine fulvo fasciis maculisque nigris ornato, un- 
tennis pedibusque fulvis, alis limpidis. 
Head black : a yellow stripe on each side of the head widening 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 Sifth 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 tawny. 
Length of the body 24 lines; of the wings 5 lines. 
North America. 
Syrpuus Porrius, Mas. 
4ineo-viridis, thorace maculis flavis ornato, abdomine fulvo vario, pedibus 
Alavis 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 tawny 
spot.adorns each side of every segment, and extends from the fore border 
nearly to the hind border; two more indistinct tawny marks 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, 
