Jl pst of fjorthmb 



By NELSON M. RICHARDSON, B.A., 



Read December 13th, 1S95. 



INTRODUCTION. 



fully agree with my friend Mr. C. W. Dale, the author 

 of " Lepidoptera of Dorset," that Portland must be 

 treated as a separate district of the county of Dorset 

 for Entomological purposes. For there is no part of 

 the county where a line of demarcation has been so 

 distinctly drawn by nature, and where so much may 

 be met with that is peculiar and interesting, and not 

 found elsewhere, as at Portland. Mrs. Richardson 

 and I have during the past ten years, done a good 

 deal of collecting, especially night collecting, in this peninsula, or 

 island, as it is commonly called, and, at the suggestion of our 

 Treasurer, I have compiled a list of all the Lepidoptera which are 

 known to have occurred there so far as I have yet been able to 

 ascertain. In the first place I would express my acknowledgments 

 to Mr. Dale, who published in Vol. I. of the Club's Proceedings a 

 list of Portland Lepidoptera. In this are contained some old 

 records of species taken formerly, but which have not occurred 

 for many years, and may therefore be presumed to have become 



