INTRODUCTION XI 



ing over and arranging the egg dates. Through the courtesy of the 

 Biological Survey, the services of Frederick C. Lincoln were again 

 obtained to compile the distribution and migration paragraphs. The 

 author claims no credit and assumes no responsibility for this part of 

 the work. 



The manuscript for this bulletin was completed in July 1940. Con- 

 tributions received since then will be acknowledged later. Only infor- 

 mation of great importance could be added. The reader is reminded 

 again that this is a cooperative work; if he fails to find in these 

 volumes anything that he knows about the birds, he can blame him- 

 self for not having sent the information to — 



The Author. 



