Vol. 15 No. 1-9 (1925)
Article 1 - The Apple Flea-weevil, Orchestes pallicornis Say (Order Coleoptera; Family Curculionidae). W. P. Flint, S. C. Chandler, P. A. Glenn
Article 2 - Notes on a Collection of Erythroneura and Hymetta (Eupterygidae) chiefly from Illinois, with Descriptions of New Forms. W. L. McAtee
Article 3 - Second Report on a Forest Survey of Illinois. The Economics of Forestry in the State. Herman H. Chapman, Robert B. Miller
Article 4 - A Preliminary Report on the Occurrence and Distribution of the Common Bacterial and Fungous Diseases
Article 5 - Changes in the Small Bottom Fauna of Peoria Lake, 1920-1922. Robert E. Richardsonof Crop Plants in Illinois. L. R. Tehon
Article 6 - Illinois River Bottom Fauna in 1923. Robert E. Richardson
Article 7 - Some Observations on the Oxygen Requirements of Fishes in the Illinois River. David H. Thompson
Article 8 - An Entomological Survey of the Salt Fork of the Vermilion River in 1921, with a Bibliography of Aquatic Insects. Charles P. Alexander
Article 9 - The Lake as a Microcosm. Stephen A. Forbes