PLATE 5 



Cephalanthera grandiflora (L.) Bab. Bex, Switzerland, 

 May 29th, 1 91 3. 



A. Ovary, column and lip (enlarged). 



B. Column (much enlarged), showing four half-poUinia leaning for- 

 wards over upper edge of stigma. 



1. Halictus malachurus K., with four half-pollinia. 



2. Andrena florea F., ?. (Both enlarged.) 



