FLY-FLOWERS 



Among the Diptera the family which most frequently visits 

 flowers and is of the most importance in pollination are the 



Fig. 83. Dutchman's-Pipe. Aristolochia Sipho 

 A fly-flower 



hover-flies or Syrphidce. They feed on both pollen and nectar, 

 and are found on many different species, their long tongues en- 

 abling them to reach the nectar in many bee-flowers. There 

 are several small flowers adapted to pollination by the hover- 



171 



