Ss WORKS ON NORTH AMERICAN ENTOMOLOGY. 
William J. Gerhard, 2209 Callowhill St., Philadelphia, Pa. 
A. Hermann « fils, 6 Rue de la Sorbonne, Paris, France. 
Ernst Heyne, Hospitalstrasse 2, Leipzig, Germany. 
U. Hoepli, Corso Vitt. Eman. 37, Milan, Italy. 
W. Junk, Berlin, W. 15, Kurfiirstendamm 20, Germany. 
Paul Klineksieck, 5 rue Corneille, Paris, France. 
Knickerbocker Book Shop, 45 West 34th street, New York, N. Y. 
Kk. F. Koehler’s Antiquarium, Kurprinzstrasse 6, Leipzig, Germany. 
Jacques Lechevalier, 28 Rue Racine, Paris VI°%, France. 
List & Francke, Thalstrasse 2, Leipzig, Germany. 
Dr. H. Liineberg’s Sortiment u. Antiquariat, Karlstrasse 4, Munich, Germany. 
Martinus Nijhoff, Nobelstraat 18, The Hague, Holland. 
G. E. Stechert & Co., 129-133 West 20th st., New York, N. Y. 
Max Weg, Leplaystrasse 1, Leipzig, Germany. 
Oswald Weigel, KGnigsstrasse 1, Leipzig, Germany. 
John Weldon & Co., 388 Great Queen street, London, England. 
H. Welter, Rue Bernard-Palissy No. 4, Paris, France. 
William Wesley & Son, 28 Essex street, Strand, London, England. 
Winkler & Wagner, XVIII, Dittesgasse Nr. 11, Wien, Germany. 
Von Zahn & Jaensch, Waisenhausstrasse 10, Dresden, Germany. 
Hermann Ulrich, Schiitzenstrasse 46, Steglitz bei Berlin, Germany. 
A not inconsiderable portion of the North American literature on 
the classification of insects has been published by the General Gov- 
ernment through various channels, and foremost among them are 
the Smithsonian Institution, the U. S. Department of Agriculture, 
the U. S. National Museum, the U. S. Geological and Geographical 
Survey, and the reports of the various surveys of the Territories. 
Many of these publications are distributed free of cost to anyone 
applying for them; while others are sold at a moderate price to cover 
the cost of publication. Many of them are out of print, and can only 
be obtained through natural history book dealers. 
The state reports of Lintner and Forbes may be obtained from the 
secretaries of the respective state agricultural societies at Albany, 
N. Y., and Springfield, Ill., while the reports of the entomologists of 
the state experiment stations can be obtained from the directors of 
the respective stations. The older reports of the state entomologist 
of Missouri and the state entomologists of Illinois (Walsh, Le Baron, 
and Thomas) are all out of print and can only be obtained by pur- 
chase from second-hand dealers. The same may be said of the well- 
known and often quoted reports of Fitch, which were published with 
the old volumes of the Transactions of the New York State Agricul- 
tural Society. 
