The series of _Bulletins_, the first of which was issued in 1875, contains separate publications comprising monographs of large zoological groups and other general systematic treatises (occasionally in several volumes), faunal works, reports of expeditions, catalogs of type specimens, special collections, and other material of similar nature. The majority of the volumes are octavo in size, but a quarto size has been adopted in a few instances in which the larger page was regarded as indispensable. In the _Bulletin_ series appear volumes under the heading _Contributions from the United States National Herbarium_, in octavo form, published by the National Museum since 1902, which contain papers relating to the botanical collections of the Museum. The present work forms No. 203 of the _Bulletin_ series. REMINGTON KELLOGG, _Director, United States National Museum_. CONTENTS Page Introduction ix Order PASSERIFORMES 1 Family Parulidae: Wood warblers 1 _Mniotilta varia_: Black-and-white warbler 5 Habits 5 Distribution 14 _Protonotaria citrea_: Prothonotary warbler 17 Habits 17 Distribution 28 _Limnothlypis swainsonii_: Swainson's warbler 30 Habits 30 Distribution 37 _Helmitheros vermivoros_: Worm-eating warbler 38 Habits 38 Distribution 45 _Vermivora chrysoptera_: Golden-winged warbler 47 Habits 47 Distribution 56 _Vermivora pinus_: Blue-winged warbler 58 Habits 58 Distribution 65 _Vermivora bachmanii_: Bachman's warbler 67 Habits 67 Distribution 73 _Vermivora peregrina_: Tennessee warbler 75 Habits 75 Distribution 86