INTRODUCTION XI 



E. McMullen, the Museum of Comparative Zoology (Ruth B. Inman) , 

 the Museum of Vertebrate Zoology (Margaret W. Wythe), Laurence 

 Stevens, George H. Stuart, 3d, and the United States National 

 Museum. 



Our thanks are also due to William George F. Harris for figuring 

 hundreds of egg measurements and for sorting over and arranging 

 a mass of egg dates. Through the courtesy of the Fish and Wildlife 

 Service, the services of May Thacher Cooke were 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 August 1942. 

 Contributions received since then will be acknowledged later. Only 

 information of great importance could be added. Since this manu- 

 script was first compiled, 18 new forms have been admitted to our 

 Check-list by the A. O. U. committee. Their life histories are included 

 in those of other forms of the species. 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 himself for not 

 having sent the information to — 



The Author. 



