PRESENT VALUES OF PRINCIPAL WORKS ON LEPIDOPTERA. 269 



only know of two in Britain : one in the Library of the Royal 

 Society ; the other is one I picked up a few years ago at a 

 second-hand bookseller's ; it was at one time the property of 

 J. C. Dale, and contains his book-plate. The present price 

 of a copy is from £5 to £12, dependent on whether it is perfect 

 or not. I was, however, offered in 1919 a perfect copy by a 

 Berlin bookseller for the price of £50 English money. It is 

 needless to say I did not close with the offer. 



Schifferm idler (and Denis). Systematisches Verzeichniss der 

 Schmetterlinge der Wiener Gegend ; 1 vol. ; 322 pp., 3 plates ; 

 Vienna, 1776. This work, one of the earliest after Linne, 

 contains a large number of original descriptions ; unfortunately 

 they are so brief that many of them are unrecognisable. 

 Fortunately what with the references Schiffermuller makes to 

 other authors, and the references other almost or altogether 

 contemporary authors make to his book, we are, however, 

 certain we recognise most of the insects he describes. Copies 

 of this book are not infrequently in the market at about 

 10.s. each. 



Scopoli, J. A. Entomologia Carniolica ; 1 vol., 420 pp. ; Vienna. 

 1763. This little book, even earlier than the last, is valuable 

 for the same reason that it is. It can usually be purchased 

 for about 5s. 



Seitz, A. Macrolepidoptera of the World (Palsearctic Section) ; 

 4 vols. ; 245 plates ; Stuttgart, 1909-1920. Purports to 

 describe and figure all the Lepidoptera of this region. Many 

 of the figures are good, and some of the letterpress, which is 

 the work of several writers, is good also. The whole work is 

 extraordinarily cheap, and as it is the only illustrated modern 

 work dealing with the region everyone should have a copy. 

 It is to be procured for £13. 



Sorhagen, L. Klein Schmetterlinge der Mark Brandenburg ; 

 1 vol., 376 pp. ; Berlin, 1886. An extremely practical and 

 useful work dealing principally with the earlier stages. Can 

 be purchased for a few shillings. 



Spuler, A. Die Schmetterlinge Europas und Raupen ; 4 vols. ; 

 155 coloured plates ; Stuttgart, 1901-10. A popular and very 

 useful work. For the price the plates are very good, and no 

 student of European Lepidoptera should be without a copy. 

 It was catalogued in 1912 at £3 and £4 5s., and in 1922 at 

 £3 3s. and £4 4s. 



Wagner, H. (Edited by). Lepidopterorum Catalogus ; Berlin, 

 1911. An enormous work purporting to give the Bibliography 

 of every Lepidopteron of the world. This work, the necessity 

 for which will be obvious to everyone, is a collaboration of 

 several well-known writers, and as is usual in such eases the 



