PREFACE. 



In the present Catalogue are included the titles of all acqui- 

 sitions to the Library of the Entomological Society of 

 London since the publication of the last Catalogue in 1893. 

 The most important additions have been derived from the 

 Library of the late Mr. H. T. Stainton, F.R.S., his widow having 

 bequeathed to the Society all books and pamphlets of which it 

 did not possess a copy. The works received from this source are 

 indicated in the following pages by a letter S after each title. 

 They are of especial interest to the Fellows of the Society, as 

 many of them formed part of the Library of James Francis 

 Stephens, which passed intact into the possession of Mr. 

 Stainton, who prepared and published a catalogue of these 

 books in 1853. Another important acquisition to the Library 

 is a large number of separate papers on Hemiptera, including 

 some copied in MS., brought together by Mr. J. W. Douglas 

 during a long series of years, and presented by Mr. McLachlan, 

 F.R.S. These papers are bound up in twelve octavo volumes, 

 and for facility of reference the volumes are quoted in the 

 present Catalogue as arranged and paged by Mr. Douglas. 

 Many books and separata have also been presented to the 

 Library by various other Fellows of the Society, more particularly 

 by Prof. Chr. Aurivillius, Hofr. C. Brunner v. Wattenwyl, Prof. 

 A. Forel, Dr. H. de Saussure, Colonel Yerbury, and Messrs. W. 

 F. H. Blandford (many separate works on economic entomology), 

 A. S. Packard, and S. H. Scudder. The other additions have 

 been acquired by purchase or exchange. The titles of all works 

 given in the Appendix of the 1893 Catalogue (pp. 293 — 312) 

 are incorporated in the present one, in their alphabetical 

 sequence. As regards the periodicals, only the new ones are 

 given. 



G. C. CHAMPION, 



Hon. Librarian. 



11, Chandos Street, Cavendish Square, 

 OrAober, 1900. 



