478 THE AMERICAN NATURALIST. [Vol. XXXVII. 



vent the frequent visits of bees. Like butterflies bees are 

 greatly influenced by the form of the flower. The long-tongued 

 bees seldom visit butterfly flowers, pollen flowers, and flowers 

 with the honey fully exposed unless it is very abundant. They 

 are most frequently collected on wasp and bee flowers, and on 

 associations of flowers with the nectar deeply placed. The per- 



