146 Transactions of the Society, 



clean. Beetles may be kept alive a day or two in clean surround- 

 ings to clean their mouths. 



3. All the water spoken of above is aqua distil. Never use 

 any other for solutions. 



4. Always wash the brushes in spirit the moment you have 

 finished with the cement ; a small detail, but absolutely necessary, 

 and not always remembered. 



