Contents
Life History of the Yellow-thighed Manakin
Alexander F. Skutch
Variation in Dumetella Carolinensis
A. L. Rand and M. A. Traylor
Red Bob-white--a Report and Correction
Leon J. Cole, Herbert L. Stoddard, and E. V. Komarek
Distribution of the Races of the Swamp Sparrow
W. Earl Godfrey
Breeding Birds of Virgin Palouse Prairie
Leonard Wing
The Antillean Grebe at Central Soledad, Cuba
Alfred O. Gross
Notes on Harpyhaliaetus
Dean Amadon
Biographical Notes on the Penard Brothers
Fr. Haverschmidt
The Sixty-sixth Stated Meeting of the American Ornithologists' Union
Olin Sewall Pettingill Jr.
The American Ornithologists' Union Report of the Treasurer, Fiscal Year Ending September 15, 1948
The Auk
Notes and News
The Auk
Recent Literature
The Auk
General Notes
Extension of Range of the Ringed Penguin
Malcolm Davis
Wilson's Petrel in Interior Florida
Alexander Sprunt
Death of a Brown Pelican (pelecanus Occidentalis)
Donald E. Stullken
Brown Pelican on the Coast of Surinam, Dutch Guiana
Fr. Haverschmidt
Booby's Beak Imbedded in Black Marlin's Back
Emmet R. Blake
The Little Blue Heron in Ontario
C. E. Hope
Green Heron Feeds on Goldfish
Albert C. Hawbecker
Yellow-crowned Night Heron in Rockingham County, Virginia
Max M. Carpenter
The Wood Ibis in Ontario
L. L. Snyder
Acquired Feeding Behavior in Mallards
A. O. Ramsay and John E. Cushing Jr.
Surf Scoter Records from Georgia
David W. Johnston
Ictinia Misisippiensis Collected in Paraguay
Emmet R. Blake
A New Hawk from India
W. Koelz
Nesting of a Swainson's Hawk in Illinois
Don S. Prentice
Comparison of 1935, 1940, and 1946 Populations of Nesting Bald Eagles in East-central Florida
Joseph C. Howell
A New Button-quail from New Guinea
Kenneth C. Parkes
The Status of the Spotted Rail, Pardirallus Maculatus, of Chiapas
Herbert Friedmann
The Pacific Flyway of the Golden Plover
F. W. Preston
Aquatic Snails Eaten by Woodcock
Ralph W. Dexter
Hoploxypterus Cayanus in Colombia
Lawrence I. Grinnell
A Preening Phalarope (lobipes Lobatus)
A. L. J. Van Ijzendoorn
Identity of Trinidad Barn Owls
James Bond
Sexual Selection in Woodpeckers
Frederick V. Hebard
A Flycatcher New to Lower California
Allan R. Phillips
Further Notes on Empidonax Affinis
Allan R. Phillips
A Polydactylous Jay
Malcolm Davis
January Song in Black-capped Chickadee
August Derleth
A Robin Rears a Cowbird
James Hodges
Atypical Copulatory Behavior of a Robin
Howard Young
More Veeries Breeding in Washington, D C
Louis J. Halle Jr.
Hooded Warbler in Calhoun County, Michigan
Lawrence H. Walkinshaw
Harris's Sparrows in Massachusetts
C. Russell Mason
White-crowned Sparrows Wintering in Maryland and West Virginia
Leonard M. Llewellyn
Covers
Front Matter
The Auk
Back Matter
The Auk