PREFACE 



The object of this book is to furnish anglers, 

 amateurs, students of entomology, and others in- 

 terested in aquatic insects, with a colored selection 

 of the most abundant and well-known trout insects 

 that appear, month by month, on the rivers and 

 lakes of the temperate regions of North America. 



Inquiries from various State entomologists failed 

 to locate a single volume or treatise on trout-stream 

 insects. Likewise, diligent search in libraries and 

 large bookstores proved futile. This shows the 

 present volume to be the first and only work on this 

 most necessary adjunct to the angler's craft. It is 

 curious that while our Government documents re- 

 lating to pisciculture are equal to, if not in advance 

 of, those of European countries, there, particularly 

 in England and France, research in the field of 

 entomology has kept pace with other branches of 

 science. 



After looking back over a period of seven trout 



