154 Mr. E. Green's Remarks on ' An Instance of Mutation.'' 



and extend his studies. Published work on Coccidae has, 

 hitherto (apart from the economic side), been too much 

 confined to pure systematics — to the making and remaking 

 of new species, or to the upsetting of well-established 

 names. Further research, in the direction in which 

 Mr. Kannan has led the way, will assuredly produce 

 valuable results, and may even revolutionise our present 

 knowledge. 



