'Blossom Hosts and Insect Guests 



with as much pleasure and profit as the Are- 

 thusa. 



A profile view of the pogonia is shown in Fig. 2, 

 its various parts indexed. Concealed behind the 



petals is the column indicated at A, Fig. 3. E and 

 D, Fig. 3, illustrate the method of pollination, 

 which is so nearly identical with that of Arethusa 

 that further analysis seems superfluous. 



