CONTENTS 



PAGE 



Introduction i 



Acknowledgments i 



General relations of the Illinois sand regions 2 



General description of the locality 2 



General history of the sand prairie vegetation 4 



The physical environment 6 



Topography of the sand regions 6 



Physical factors of the sand prairie environment 7 



The plant environment lo 



Local history of the vegetation lo 



Relation of animals to plants 13 



Annotated list of animal species 13 



The associations of the sand prairie 67 



Method of analysis of the animal assemblages 67 



The prairie formation 68 



The bunch-grass association 68 



Phytophagous animals 69 



Predaceous animals TZ 



Parasitic animals 76 



Scavengers "/"j 



Invaders from other associations 78 



The Panicum pseiidopubescens association 79 



The black-soil transition association 80 



The blowout formation 82 



The basin association 84 



The windward slope association 84 



The blowsand association .85 



The blowsand complex 88 



The deposit association 90 



Successional relationships in the sand prairie 90 



Bibliography 92 



Explanation of plates 94 



