94 



Wiener entcoiologische Zeitung. Vienna. Eighteen volumes pub- 

 lished. 



The Entomologist's Record and Journal of Variation. London. 

 Eleven volumes published. 



Tijdschrift voor Entomologie. \s Gravenhage, Holland. Forty- 

 two volumes published. 



Bullettino della Societa Entomologica Italiana. Florence. 

 Thirty-one volumes published. 



Hor.e Societatis Entomologicje Rossice. St. Petersburg. Thirty- 

 three volumes published. 



Annales des Sciences Naturelles. Paris. Commencino- with 1824. 



HOW TO OBTAIN ENTOMOLOGICAL BOOKS AND PAMPHLETS. 



Comparatively few of the works treating of the classification of North 

 American insects have been published as separate books; but such as 

 have been so published, if of comparatively recent date, can be obtained 

 through the regular book trade. By far the greater number of the 

 monographs and synopses mentioned in the preceding pages have been 

 published in scientific periodicals and transactions of scientific societies. 

 These periodicals and transactions can be obtained through the societies 

 which publish them and through the publishers; but, in the case of 

 transactions, single volumes, and more especially single papers, are 

 seldom sold, and the older volumes are liable to be out of print. 

 Moreover, the expense attending the purchase of all of the periodicals 

 containing the publications on a given order of insects will be so great 

 as to put them beyond the reach of most entomologists. The custom 

 of placing at the disposal of authors a number of separate copies of 

 their papers overcomes this difficulty to some extent and creates a 

 small supply. Thus it often happens that a person interested can 

 obtain a copy of a scientific paper hy addressing the author personally. 

 Many of these separate copies also get into the possession of dealers in 

 second hand books, and can be purchased from them. The American 

 Entomological Society, Philadelphia, Pa., and also a few other societies 

 here and in Europe offer for sale from their duplicates many of these 

 authors' extras, and in some cases publish lists. There are, moreover, 

 certain business establishments which make a specialty of the sale of 

 works and pamphlets on natural history, including entomology, and 

 it is chiefly through such establishments that the student is enabled to 

 secure the larger portion of the works needed. 



In Europe there are several of considerable reputation. All of 

 those publishing catalogues of entomological books and pamphlets are 

 included in the following list: 



R. Friedlaender & Sohn, Carlstrasse, 11, Berlin, Germany. 



