SOURCES OF INFORMATION 



33 



tion of certain specimens. Mr. N. K. Bigelow very kindly assisted 

 by the examination of many stomachs. I wish furthermore to ac- 

 knowledge my indebtedness to other friends, notably my assistant of 

 former years, Mr. T. B. Kurata, now of the Museum of Toronto; 

 Miss Clementina Spencer, of Coe College; Mr. George T. McNair, 

 and Mr. Ben H. Peterson, of Cedar Rapids. The acknowledgments 

 due to those who have contributed in various ways to the further- 

 ance of this work are many. I mention again Dr. G. F. Kay and 

 Professor C. C. Nutting, to both of whom I am peculiarly indebted 

 for suggestion and direction. I wish also to acknowledge the kind- 

 ness of Mr. C. B. Soutter, of Cedar Rapids, who made possible a 

 trip through Northern Iowa in 1902, when much valuable informa- 



Fig. 10. Dead Man's lake, a swamp at the south foot of Pilot Knob, Han- 

 cock county (Macbride). 



tion was secured, and of Col. William G. Dows, of Cedar Rapids, 

 who likewise has put within easy reach many facilities for the prose- 

 cution of this work. 



To Professor H. R. Dill, of the State University of Iowa, I am 

 especially obligated for a very considerable portion of the data on 

 stomach contents. Through his kindness all the stomachs of rap- 



