BULLETIN 



LLINOIS STATE LABORATORY 



Uh 



NATURAL HISTORY 



VOL. I , NO. 3 



PAGE 



I. On Some Interactions of Organisms. ...'... . 3 



11. The Food of Fishes: Acanthopteri 19 



III. On the Food of Young Fishes 71 



1\'. Tlie Food of Birds.. 86, 



\ . Notes upon the Food of Predaceous Beetles. 162 



VI. Notes on Insectivorous Coleoptera 167 



SECOND EDITION 



GAZETTE PRESS 



CHAMPAIGN. ILL. 



