72 



That this fluid is volatile is shown by the fact that the insects when 

 in the cabinet seldom, if ever, go greasy. 



I conclude, as I commenced, by expressing my regret that I have 

 not been able to deal with this interesting group in a better manner, 

 for I had intended giving some notes on breeding, with special 

 reference to Mendelian laws. Unfortunately, I promised that which 

 circumstances would not permit me to fulfil. 



