B 





Fig. 22. Mounting an insect on minuten 

 nadeln. 



be pinned and placed directly into the col- 

 lection without special treatment. In the 

 butterflies and moths, however, it is neces- 

 sary to expand the wings to show a view 

 of their venation and markings. 



The Spreading Board and How to Use 

 It. In order to keep the wings in a uni- 

 form position a spreading board is used 

 which consists of two pieces of smooth 

 board with a slight upward slant. The 



