O PORRITT : LIST OF YORKSHIRE LEPIDOPTERA. 



I purposely avoid saying anything about the geology or 

 botany of our county, as, although they have of course interest- 

 ing relationship to, and close connection with, the lepidopterous 

 fauna, they have already been fully dealt with by other members 

 of our Union, in other portions of our " Transactions," or in 

 separate works which treat of the respective branches of science. 



