434 Kansas Academy of Science forms. As a result, it is almost impossible to classify many of the summer resident birds to subspecies with any degree of certainty. Such birds as nighthawks, red-winged blackbirds, robins, mockingbirds, and lark sparrows are so variously intermediate that any attempt to place certain specimens in one subspecies or another must necessarily depend upon the personal equation to an unwarranted extent. Only by a careful study of a large series of breeding birds from every section of the state, and by comparing them with typical eastern and western forms, can one hope to outline and map the ranges, and the zones of intergradation with any degree of accuracy. At the present time, our collections are inadequate for such an undertaking, since specimens from the most critical localities are usually lacking. As a result, the range of most of the birds is known only in a very general way. In this list I have attempted to give a short and concise statement, in a single sentence, of the present status of each bird, and if the status has changed in recent years, of the former status as well. Names enclosed in brackets are considered as forming a hypothetical list. Such a list is a difficult undertaking, since ornithologists do not agree as to the best criteria for it. Some urge that any species occurring within fifty or one hundred miles of the state line should be listed. Others take the opposite extreme and exclude everything not supported by known specimens. I have not included anything in the hypothetical list which has not been reported seen or taken in the state. Very few pure sight records are included in the list proper, but a number which have been reported as killed in the state are included if the authority seems good. Thus the black vulture, white-necked raven, American raven, Mexican cormorant, ruffed grouse and a few others are included, even though the specimens have been lost. In the preparation of this list I have examined a number of collections in the various institutions of the state, both to check up on rarities reported in published records and in the hope of finding species and subspecies not re- ported: The following collections were examined, and I wish to express my thanks to those who have charge of them for the very courteous treatment which I received at all times: University of Kansas Museum of Birds and Mammals, and the Wetmore collection, at Lawrence; the Goss collection, at Topeka; the Rinker collection at Hamilton; the Matthews collection at Wichita University; the collection of the Kansas State Teachers College, at Emporia, and the collection of the Kansas State Agricultural College at Man- hattan, including the Blachly collection. The present paper is a condensed form of a thesis prepared at the University of Kansas. Acknowledgment is here made to all of those persons who have helped in the preparation of the paper. Mr. C. D. Bunker, assistant curator in charge, of the Museum of Birds and Mammals, University of Kansas, has lost no opportunity to be of aid in this study. It was he who suggested the work in the first place, and who gave encouragement throughout. He turned over the entire collection of the Museum to my use, and made possible several field trips without which this work would not have been as complete as it is. The following persons have helped in the identification of specimens: Dr. Alexander Wetmore, Dr. Harry C. Oberholser, Dr. J. Grinnell, Dr. Herbert Friedmann, Dr. Alden H. Miller, and Dr. James L. Peters. In addition, I am