11 



insect depredation. Most of the charts are photographed from originals 

 used in my lectures more than Twenty years since, and do not indie 

 so far as classification goes, some of the later views adopted. Still 

 another series gives interior and exterior views of the insectary of the 

 Department, and interiors of the entomological rooms in the Depart- 

 ment, and the National Museum. 



The whole exhibit is intended to illustrate primarily the nature of 

 the national collection of insects and the methods of work followed in 

 the IT. S. Department of Agriculture, .and 1 have felt in preparing it 

 that such a collection would be most likely t<> prove unique and not in 

 any way duplicate what the different States as such may do in the same 

 line. 



U. S. Department of Agriculture. 



Division of Entomology, 



Washington, 1). C, April 30, i 



