214 



hairs of its tail are in contact witli tlic pilose portion of tlie style and 

 become pollinated, if the tlower has recently come into l)loom and the 

 style has not yet shed its hairy coating. But this leaf-cutter is not wholly 

 dependent on its position while collecting honey for a sni)ply of pollen. 

 On several occasions it was seen clinging to the style and transferring 

 pollen to its abdomen with its hind-legs, a maneuver that no other bee 

 seems capalile of performing. "With the hairs of its tail charged with 

 pollen it is easy to understand how cross-fertilization is effected, as it 

 passes from one tlower to another: and so systematic are the movements 

 that they appear to be evolved for the purpose th(>y fultil. So far as 

 the writer has been able to discover, no other insect than .1/. hi-eris is of 

 use in fertilizing the tall belltlower. Another leaf-cutter, Mf<j(ichilr iii- 

 fr(i(/ilis ("resson*, was often seen collecting honey from Inipatieiis (inred 



Figures. Campanula Amekicana L. 



a. Triangular bases of stamens. 



b. IMlose end of style covered with pollen and bee collecting honey. 



c. Style denuded of hairs, bee about to brush against lobes of stigma. 



d. Style denuded of hairs and bee in position on style while collecting honey. 



•Muld. and pollen on HrlUiitthnK iuiiuiks L. growing nearby, but was never 

 seen on ('. Aiucrk-aiia. 



The tall bellflower, on which the observations described Avere made, 

 grew in the back yard of a city residence, :ind was in bloom from July 



