6 PREFACE 



Museum of Natural History, of New York, the large collec- 

 tions in both museums were placed at the disposal of the 

 artists and the author. Thanks are due especially to Mr. 

 Witmer Stone, Mr. Samuel N. Rhodes, Dr. J. A. Allen, and 

 Mr. Frank M. Chapman for valuable advice and assistance. 



AUSTIN C. APGAR. 

 State Normal School, 

 Tkenton, New Jersey. 



