In the preparation of sections 2, 3, and 4 of the exhibit, including 

 labels, the author wishes to acknowledge the valuable service of Mr. 

 W. F. Fiske. 



The exhibit is in four sections, and consists of fifty-four cases, one 

 large wall case, and a set of photographs. There are in all 789 speci- 

 mens of insects, 623 specimens of work, and 18 photographs. Sec- 

 tions 1, 2, and 4 are in the Division of Entomology exhibit in the 

 Government Building, while section 3 is in the forestry building, 

 with the Bureau of Forestry exhibit. 



Section I.— INSECT ENEMIES OF FORESTS IN THE NORTHWESTERN 

 AND THE NORTHEASTERN STATES. « 



This exhibit consists of material collected by the author during 

 special investigations for the Division previous to the organization of 

 the forest-insect investigations as a separate section. 



The labels are copied in this catalogue with such revisions, correc- 

 tions, and additional matter as seems necessary. 



Reports of the two special investigations, during which the speci- 

 mens were collected, will l>e found in Bulletin No. 21, n. s., of the 

 Division of Entomology, entitled, "Preliminary Report on the Insect 

 Enemies of Forests in the Northwest;" and Bulletin No. 28, n. s., 

 "Insect Enemies of the Spruce in the Northeast." The exhibit was 

 prepared by- the author, assisted by Mr. W. E. Rumsey, of the West 

 Virginia Experiment Station. 



Section II.— INSECT ENEMIES OF FORESTS IN GENERAL. 



This section consists of material collected since the 1st of July, 1902, 

 and such other specimens in the general collection of the Division of 

 Entomology and the National Museum as were not represented in the 

 forest insect collections. It will be found in cases 25 to 48, inclusive, 

 and in a large wall case. In this section the transformations and 

 work of several representatives of each class of insects are shown, 

 while other species, having analogous habits and transformations, are 

 represented by the adult insects alone. 



Section III.— INSECT ENEMIES OF FORESTS (SPECIAL PROBLEMS 

 UNDER INVESTIGATION, IN COOPERATION WITH THE BUREAU 

 OF FORESTRY) . 



This section comprises specimens collected by the author and assist- 

 ants during special investigations of some of the principal depreda- 

 tions by forest insects now attracting attention. It will be found in 

 six large cases, numbered 49 to 54, in the Forestry Building, in connec- 



« This exhibit was shown at the Pan-American Exposition, at Buffalo, New York, 

 in 1901, and at the Interstate and West Indian Exposition at Charleston, S. C, 

 in 1901-2. 



