PREFACE TO THE THIRD EDITION 



In preparing the third edition of this volume for publication, the 

 editor has left almost intact the valuable work of the late Dr. Mcllvaine. 

 The changes to be noted in the revision are more matters of re-arrange- 

 ment than alterations of the original text. 



It is gratifying to record the fact that while a large amount of addi- 

 tional literature has been published concerning many of the species rep- 

 sented in the first and second editions, there appears none that essentially 

 affects the value of the observations there recorded. 



Of the great number of new species of fungi discovered since the last 

 edition, the most interesting, as pertaining to the scope of this work, are 

 those published by Professor Chas. H. Peck in the Reports of the New 

 York State Museum. From these, thirty or more have been included as 

 a supplement to this edition. These have been selected as most likely to 

 be found by those using this work. In re-grouping Prof. Peck's illus- 

 trations, to adapt them to the cut form in this book, care has been taken 

 to represent, as fully as possible, effects difficult to secure where color 

 can not be employed. The natural size of the plants is indicated on 

 each cut, and the spores are represented magnified 400 diameters. 

 Prof. Peck's wording is scrupulously transcribed in all descriptive mat- 

 ter preceding the occurrence of his name in italics. 



CHAS. F. MILLSPAUGH. 



Field Museum of Natural History, 



September, 1911. 



45 705 



