BIENNIAL REPORT. 
To THE TRUSTEES OF THE UNIVERSITY OF ILLINOIS: 
GENTLEMEN: In accordance with your requirement as ex- 
pressed in your action concerning the status of the State Labor- 
atory of Natural History, taken June 8, 1892, I beg to submit 
the following report on the work of the Laboratory during the 
two years just passed. 
The points of principal interest in our recent operations are 
(1) the Columbian Exposition exhibit of the zoology of Illinois, 
made by the Laboratory in 1893 under the auspices of the State 
Board of World’s Fair Commissioners, and the accumulations of 
material coming into our possession at the close of the Exposi- 
tion; (2) the establishment, conjointly with the University, in 
1894, of a biological station for the continuous investigation of 
the aquatic life of the Illinois River and its dependent waters, 
near Havana; and (3) an elaborate experimental work done this 
year with measures for the destruction of the chinch bug, and 
especially for the dissemination of the contagious diseases of 
that insect, undertaken by the Laboratory staff, with the coop- 
eration of the State Agricultural Experiment Station. 
COLUMBIAN EXPOSITION EXHIBIT. 
Our zoological exhibit, occupying 3,000 square feet of floor 
space in the Illinois State Building at Jackson Park, was so 
Planned as to present the main and most attractive features of 
the native animal life of the State, and at the same time to illus- 
trate the operations of the State Laboratory of Natural History, 
and of the State Entomologist’s office associated with it. The 
exhibit was thus limited to specimens of the birds, fishes, and 
insects of the State. 
The relations of the Laboratory to the University of Illinois 
were shown by the position of this exhibit—immediately beside 
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