Contents
Fat-free Weights of Birds
Clyde E. Connell, Eugene P. Odum, and Herbert Kale
Secondary Articulation of the Avian Mandible
Walter J. Bock
Proceedings of the Seventy-seventh Stated Meeting of the American Ornithologists' Union
H. G. Deignan
Recent Literature
The Auk
Notes and News
The Auk
Obituaries
The Auk
General Notes
Bachman's Sparrow Hiding in a Burrow
James A. Pittman Jr.
Mutation in an African Flycatcher, Dyaphorophyia Concreta
Melvin A. Traylor
First Specimens of Sooty Shearwater for Delaware
Peter W. Post
Semipalmated Sandpiper and Western Sandpiper in Tamaulipas
George Miksch Sutton
Color of the Tarsi and Toes of the Black Rail
Brooke Meanley and Robert E. Stewart
Egg Replacement by a House Wren: Incubation Period
Hervey Brackbill
Errors Concerning the Date and Source of the Name Melanotrochilus Eudes-deslongchamps (trochilidae)
Robert M. Mengel
The Skeleton and Systematic Position of Gampsonyx
Pierce Brodkorb
The Duration of Postnuptial Metabolic Refractoriness in the White-crowned Sparrow
James R. King, L. Richard Mewaldt, and Donald S. Farner
Nesting of Louisiana Waterthrush and White-throated Sparrow in Eastern Coastal Massachusetts
Henry S. Forbes and Jane D. O'Regan
Thick-billed Kingbird Nesting in New Mexico
Dale A. Zimmerman
The Migratory Status of Some Western Desert Birds
Gordon W. Gullion
Covers
Front Matter
The Auk
Back Matter
The Auk