Papers on Geology : 



Recent Crustal Movements in the Eastern Part of the Great 



Lakes Region, Charles E. Decker 97 



The Loess in Illinois; its Age and Origin, T. E. Savage 100 



Papers on Botany : 



Comparison of a Rocky Mountain Grassland with the Prairie of 



Illinois, George D. Fuller 121 



Studies in Phyllosticta and Cercospora, Esther Young 131 



Method of Prophesying the Life Duration of Seed, James E. 



Groves * 133 



Peculiar Examples of Plant Distribution, H. S. Pepoon 136 



The Grass Flora of Illinois, Edna Mosher 137 



A Florida Smut, Ustilago sieglingiae in Illinois, Margaret Mehlhop 140 



Papers on Zoology : 



What California is Doing in the Control of Injurious Insects, 



Gertrude Bacon 145 



The Labium of the Xymphs of Zygoptera, Philip Garman 146 



Comparative Morphology of some Carabid Larvae, Clyde C. 



Hamilton 147 



Some Adaptations for Respiration in Aquatic Hemiptera, Anna 



G. Newell 147 



Mouth Parts of the Blow Fly, Alvah Peterson ..„ 148 



Pupae of the Lepidopterus Family Sphingidae. Edna Mosher 148 



Constitution and By Laws 150 



List of Members ,. 153 



