Bulletin of the Museum of Comparative Zoology 

 AT HARVARD COLLEGE. 

 Vol. LXIII. No. 2. 



SOME CRITICAL NOTES ON BIRDS. 



By Outram Ba.vgs axd Thom.\s E. Pexard. 



CAMBRIDGE, MASS., U. S. A.: 



PRINTED FOR THE MUSEUM. 



JuxE, 1919. 



