Vi CONTENTS. 



ARTICLE III. 

 PARASITIC FUNGI OF ILLINOIS. PART I. BY T. J. 



BURRILL 141 



INTRODUCTION 141 



DESCRIPTIVE CATALOGUE 152 



Uredinece 152 



Key to Genera 155 



GLOSSARY 243 



ERRATA 247 



INDEX TO HOST PLANTS 249 



INDEX TO SPECIES 252 



ARTICLE IV. 



STUDIES ON THE CONTAGIOUS DISEASES OF INSECTS. I. 

 BY S. A. FORBES 257 



DESCRIPTION OF FLACHERIE IN THE CABBAGE WORM 261 



The Characteristic Bacteria 265 



Contagious Character of the Disease 266 



ARTIFICIAL CULTURES OF BACTERIA 271 



Culture Experiments 274 



CONTAGIOUS DISEASE OF THE SILKWORM 277 



Description of the Disease : two forms 277 



The Characteristic Bacteria 281 



Contagious Character of the Disease 284 



Artificial Cultures 285 



Infection Experiments 289 



History of the Check Lot 293 



DISEASE OF THE YELLOW-NECKED APPLE CATERPILLAR 295 



Description of the Disease 295 



The Characteristic Bacteria 296 



Contagious Character of the Disease 298 



Artificial Cultures 298 



Infection Experiments 300 



THE WALNUT CATERPILLAR: A SERIES OF OBSERVATIONS, CUL- 

 TURES, AND EXPERIMENTS 301 



Infection of the Zebra Caterpillar 305 



Infection of the European Cabbage Worm 312 



MUSCARDINE 317 



SUMMARY AND CONCLUSION . .317 



