88 PLANTS AND ANIMALS 
from the ground, assemble for the feast, and incident- 
ally transfer from flower to flower pollen which may 
adhere to their bodies. 
In a large number of flowers such general feasting 
is discountenanced, insect traffic is regulated, the 
Fic. 16,—DwarF CorNEL (CorNuUs SUECICA), 3, AND SINGLE 
FLOWER ENLARGED, 
visits of insects of little or no service to the plants is 
discouraged, and special arrangements are made to 
attract and minister to the needs of those insects 
whose visits are of most benefit. Except where 
