Contents
Land Birds Over the Western North Atlantic
Susan Irving Scholander
Remarks on the Original Sources of Displays
M. Moynihan
Types of Hostile Display
M. Moynihan
In Memoriam: Elsie Margaret Binger Naumburg
John T. Zimmer
Observations on the Avifauna of an Ozark Plateau
Philip S. Callahan and Howard Young
Sexing Mature Columbiformes by Cloacal Characters
Wilmer J. Miller and Frederic H. Wagner
The Molt of Hummingbirds
Helmuth O. Wagner
Thirtieth Supplement to the American Ornithologists' Union Check-list of North American Birds
The Auk
Recent Literature
The Auk
Obituaries
The Auk
General Notes
Mockingbird Attacking Blacksnake
Thomas W. Hicks
Apparent Copulation of Baldpate in Central Massachusetts
L. M. Bartlett and Garry Atwell
Barn Owls with Two Broods of Young
G. Victor Morejohn
Ross's Goose in Texas
Raymond J. Buller
A Record of the Mexican Crossbill (loxia Curvirostra Stricklandi) from Fort Worth, Texas
Warren M. Pulich
The Identity of Pyrrota Valeryi J and E Verreaux
Robert W. Storer
Suggestions Regarding Alcoholic Specimens and Skeletons of Birds
Andrew J. Berger
Chipping Sparrow with Song of Clay-colored Sparrow at Toronto
Ronald R. Tasker
Covers
Front Matter
The Auk
Back Matter
The Auk