Vol. 7 No. 1-10 (1909)
Article 1 - Studies of the Life History, Habits, and Taxonomic Relations of a New Species of Oberea (Oberea ulmicola Chittenden). F. M. Webster
Article 2 - Studies of the Habits and Development of Neocerata rhodophaga Coquillett. F. M. Webster
Article 3 - A Review of the Sunfishes of the Current Genera Apomotis, Lepomis, and Eupomotis, with Particular Reference to the Species Found in Illinois. R. E. Richardson
Article 4 - On a New Shovelnose Sturgeon from the Mississippi River. S. A. Forbes and R. E. Richardson
Article 5 - Notes on Species of North American Oligochaeta. V. The Systematic Relationships of Lumbriculus (Thinodrilus) Inconstans (Smith). Frank Smith
Article 6 - A Catalogue of the Mollusca of Illinois. Frank Collins Baker
Article 7 - On the Biology of the Sand Areas of Illinois. Charles A. Hart and Henry Allan Gleason
Article 8 - On the Local Distribution of Certain Illinois Fishes: An Essay in Statistical Ecology. S. A. Forbes
Article 9 - An Ornithological Cross-section of Illinois in Autumn. S. A. Forbes
Article 10 - The Oribatoidea of Illinois. Henry E. Ewing