282 THE ENTOMOLOGIST. 



One would like to cherish the consoling thought that, though 

 mere man and his works must ever change for better or for 

 worse, Nature — and as entomologists we should like to say 

 insect life in particular — endures indefinitely ; one would like to 

 think that the insects Wallace saw in 1854 were there in Dutch 

 times, were there in the days of the Portuguese, and, in all 

 likelihood, were there before the foundation of Malacca more 

 than five hundred years ago ; and with that thought one would 

 like to look forward to further long periods, secure in the 

 knowledge that the insects noted in 1913 will be noted again 

 next year, ten or a hundred years hence. 



But, unfortunately, man the vandal and man the lover of 

 Nature cannot exist together in the same place ; the former 

 destroyed the old Portuguese fortifications at Malacca in the 

 beginning of the nineteenth century ; a hundred years later his 

 successors planted Wallace's collecting ground at Ayer Panas 

 with rubber, and so it goes on, year by year, these historic 

 places become less recognizable, and Nature gives way before the 

 march of our boasted civilization. 



It is well that a Society for the encouragement of Nature 

 reserves has been instituted in England; it is by no means too 

 soon to start the same in the East. Why should we sit idle, 

 exclaiming piously " Sic transit gloria mundi"? 



"YELLOW IMAGINES OF PIERIS BRASSICM:* 

 By F. W. Frohawk, M.B.O.U., F.E.S. 



In the 22nd number of the ' Internationale Entomologische 

 Zeitschrift,' published at G-uben on August 30th, 1913, there is 

 an interesting note under the above heading on p. 151 by Mr. 

 Franz Bandermann, of Halle a/ Saale, which I fancy may be of 

 interest to English entomologists, and of which I append a 

 translation : — 



" Many discoveries have been made through chance, and 

 in this way I secured in quite a remarkable way yellow imagines 

 of Pieris brassicce in May of this year. I was examining my 

 boxes of duplicates in which several species were stored. In one 

 of these boxes I had placed six examples of this Pierid which I 

 had taken four days previously from the setting boards. As I 

 noticed some mites moving in the box I killed them with benzine, 

 without, however, touching any of the specimens with the liquid. 

 After a week I wanted to put some more specimens in this box, 

 and when I opened the lid I was much surprised to see some 

 yellow brassicce. At first I could not find my explanation for 

 this change of colour, but soon came to the conclusion that 

 only the yellow paper, which had been used for pasting together 



