INTRODUCTION. 



The following catalog-ue of the exhibit of economic entomology 

 made by the Bureaa of Entomology, U. S. Department of Agriculture, 

 at the Lewis and Clark Centennial Exposition, will, it is believed, 

 increase the usefulness of the exhibit by furnishing the visitor, in a 

 convenient form for future reference, much of the data contained on 

 the labels, and by supplying him with references to published articles 

 from which additional information can be gained. 



The catalogue has been compiled from Bulletins Nos. 47^' and 48'^ of 

 this Bureau and includes all portions of each of these bulletins, revised 

 and corrected, which relate to the exhibits installed at Portland. 



Owing to the fact that less space was available for the exhibit by 

 the Bureau of Entomology at Portland than at St. Louis, it has been 

 necessary to reduce the size of the exhibits considerably, and this has 

 in most part been accomplij^hed by leaving out insects which affect 

 strictly eastern or southern crops. In other respects, however, the 

 exhibit is very similar to that made at St. Louis, and includes all those 

 features which proved of especial interest there. Care has been taken 

 to retain such insects as are of especial importance on the Pacific coast 

 and those which affect important Pacific coast industries, such as fruit 

 raising and lumbering. 



Persons desii'ing further information than can be gained from this 



catalogue, or from conversation with the attendant in charge of the 



exhibit, are requested to address the writer at the U. S. Department of 



Agriculture, Washington, D. C. 



L. O. Howard, 



Entomologist. 



f'Catalogue of the Exhibit of Economic Entoraologj^ at the Louisiana Purchase 

 Exposition, St. Louis, Mo., 1904; by E. S. G. Titus and F. C. Pratt. 



^Catalogue of Exhibits of Insect Enemies of Forests and Forest Products at the 

 Louisiana Purchase Exposition, St. Louis, Mo., 1904; by A. D. Hopkins. 



(3). 



