SOME INSECT ADAPTATIONS. gt 
red clover cannot grow without the help of bumblebees. 
No more can bumblebees flourish without the honey 
prepared by the growing clover. When this partner- 
Fic. 34.—Fertilization of a Flower by an Insect. wu, calyx; 4, curved 
upper lip; ¢, under lip, on which the bee stands while sucking the 
honey; 4, pistil; d@’, pistil at a later stage; ¢, stamen; e¢’, stamen 
shedding the pollen from its anther on the back of the bee; /, bee’s 
proboscis, with which it reaches the honey. 
ship between the bee and the clover began we cannot 
say, but there is reason to believe that passing years, 
with their new generations of both bees and clover, 
only increase the dependence of each upon the other. 
