PLATE 57 



A. Ophrys apifera var. Trollii. Bex, Switzerland, May 24th, 191 3. 



B. Ophrys apifera, varying in the direction of Trollii. Wiltshire, June 

 27th, 1928. 



C. Ophrys apifera var. chlorantha. 



D. Ophrys arachnites x aranifera, x Ophrys Aschersonii De Nant. 

 Bex, Switzerland, May 14th, 19 13. 



I. Enlarged flower of specimen from Saarbriicken, 1926. 



