HOW TO OBTAIN ENTOMOLOGICAL BOOKS AND PAMPHLETS. 117 
ZEITSCHRIFT FUR WISSENSCHAFTLICHE [NSEKTENBIOLOGIE. Berlin. A 
continuation of the “Allgemeine Zeitschrift fiir Entomologie.” 
Begun in 1901. © 
Contains lists of recent literature and many reviews. 
ZooLtociscHER ANnzEIGER. Leipzig, Germany. Begun in 1876. 
Contains bibliography of recent literature. 
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 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 socie- 
ties. 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 likely 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 by addressing the author person- 
ally. 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., the Entomolog- 
ical Society of Washington, and a few other societies here and in 
Europe offer for sale from their duplicates many of these authors’ 
business establishments which make a specialty of the sale of works 
and pamphlets on natural history, including entomology, and it is 
chiefly through these dealers that the student is enabled to secure 
the larger portion of the works. All of those publishing catalogues 
of entomological books and pamphlets are included in the following 
list : 
J. B. Balliére et fils, 19 Rue Hautefeuille, Paris, France. 
The Brooklyn Book Exchange, 176 Clarkson St., Brooklyn, N. Y. 
The Brownell Book Co., 11 East 59 St., New York, N. Y. 
S. Calvary & Co., Neue Wilhelmstr. 1, Berlin NW. 7. Germany. 
F. I. Dames, Voss-Strasse 32, Berlin, Germany. 
Dulau & Co., 37 Soho Square, London, W., England. 
The Franklin Bookshop, 920 Walnut st., Philadelphia, Pa. 
R. Friedlaender & Sohn, Carlstrasse 11, Berlin, Germany. 
Georg & Co., Freiestrasse 10, Basel, Switzerland. 
