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" In presenting to the Society this evening a copy of my 

 friend Mr. J. H. A. Jenner's list of the ' Macro-Lepidoptera of 

 East Sussex,' I deem it a fitting opportunity to make some 

 remarks on the present scarcity in that district of several of 

 the species of Rhopalocera which, in my young days, half a 

 century ago, were frequently, or even commonly, met with. 



"Aporia cratcegi, L. — Mr. Jenner states, ' Formerly at Holm- 

 bush, Henfield.' When about the year 1838 I first in earnest 

 commenced to make a collection of the British Lepidoptera, 

 I was visiting my relations, in the month of June, at Keymer, 

 a parish situated between the Burgess Hill and Hassocks 

 Gate stations of the London and Brighton Railway. I sent 

 to my uncle, the late Mr. Auckland, of Lewes, for a net, and 

 he very kindly gave me the first I possessed ; he was himself 

 an entomologist, and I may say that it was mainly owing to 

 him that I took up the study. As soon as I had obtained 

 the net I went into a field at the back of the house, and the 

 first insect I took was Aporia cralcegi, and it was very abun- 

 dant ; probably I might have very easily taken a hundred speci- 

 mens. This by no means surprised me, as Mr. Auckland had 

 often told me that he had always obtained it in that neigh- 

 bourhood for many years in succession. Being a young 

 beginner, and feeling sure of taking it in after years, I cap- 

 tured but a moderate number ; of these one still remains in 

 my cabinet. A small mill-stream ran in front of the house, the 

 sides of which were well-wooded, and here the insect abounded. 

 I visited Keymer the next year, intent on taking more 

 A. cratcegi ; I saw but one, and this I still possess. For some 

 fifteen years I was often at Keymer, but never saw the insect 

 again ; and I believe that now I am the only Sussex ento- 

 mologist living who has ever seen the species in plenty in 

 that district ; and it appears from Mr. Jenner's note that the 

 insect is extinct in the county. 



" Mr. Auckland's note, which I have before me, gives as 

 localities, ' Chailey, May 30th, 1834; Newick, June, 1835; 

 Lindfield, June, 1836.' My own opinion is that in the earlier 

 decades of the century a flight of this insect visited Sussex 

 from some part of the Continent, and that our climate has 



