4 THOMAS SADLER ROBERTS 



records, covering a period of forty odd years during which he has 

 been studying Minnesota birds, have been largely augmented by 

 correspondence and lists generously furnished by numerous ob- 

 servers in the state to whom it is desired in this connection to 

 express appreciative thanks for their kind and invaluable assistance. 

 The Biological Survey at Washington has also from time to time 

 very courteously permitted the transcription from its files of all 

 reports from Minnesota observers. Mr. Carlos Avery, Game and 

 Fish Commissioner of Minnesota, has kindly furnished the list of 

 Game Refuges with area of each and also the map showing their 

 location. I have to thank Dr. Witmer Stone, of Philadelphia, 

 editor of The Aiik, for advice in regard to several important matters. 

 For the carefully prepared Index and assistance in many other 

 ways, the author is indebted to his friend Mr. William Kilgore, Jr. 



Animal Biology Building, 

 University of Minnesota, 

 Minneapolis, Minnesota. 



Young Rose-breasted Grosbeaks 



