CONTENTS 



ARTICLE I. AN ASSOCIATIONAL STUDY OF ILLINOIS SAND pace 

 PRAIRIE. BY ARTHUR G. VESTAL, A.M. (5 Plates) Septem- 

 ber, 1913 1-96 



Introduction I 



Acknowledgments I 



General relations of the Illinois sand regions: — 



General description of the locality 2 



General history of the sand prairie vegetation 4 



The physical environment : — 



Topography of the sand region 6 



Physical factors of the sand prairie environment 7 



The plant environment : — 



Local history of the vegetation 10 



Relation of animals to plants 13 



Annotated list of animal species 13 



Gastropoda 14 



Oligochseta 14 



Chilopoda 14 



Diplopoda 14 



Phalangina 15 



Araneina 15 



Acarina 17 



Collembola 17 



Platyptera 17 



Ephemerida 17 



Neuroptcra 18 



Odonata 18 



Orthoptera ip 



Thysanoptera 25 



Hemiptera 26 



Coleoptera 31 



Lepidoptera 52 



Diptera 54 



Hymenoptera 56 



Amphibia 60 



Reptilia 61 



Aves 62 



Mammalia 65 



