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 APPENDICES ACKNOWLEDGMENTS

following persons have made essential contributions without which this study could not have been pursued to its present degree of completion:

The President and Trustees, the Dean of the Graduate School, and the Zoölogy faculty of Indiana University, who are responsible for my part-time appointment as an Associate of the Waterman Institute from 1925 to date, and who have appropriated funds for collections, technical assistance, and other expenses of these investigations.

Harvard University, and particularly Dr. William Morton Wheeler of that institution, which granted the Sheldon Travelling Fellowship under which the initial collections were made for this study in 1919-1920.

The Trustees of the Elizabeth Thompson Science Fund, who awarded Grant No. 259, made in 1924, toward the expenses of this study.

The Board of Directors of the Bache Fund, who, in 1924, made their Grant No. 255 toward this study.

My wife, Clara McMillen, who has contributed encouragement, advice, material, and editorial assistance.

Dr. Fernandus Payne, Head of the Zoölogy Department and Dean of the Graduate School of Indiana University, who has given material, assistance, encouragement, and critical aid in genetic interpretations of the problems involved.

Dr. G. W. D. Hamlett, of the Zoölogy Department of Indiana University, who has offered criticisms of the interpretations, especially of the genetic interpretations, of the biologic data.

Dr. B. J. Vos, of the Department of German at Indiana University, who has verified the German translations published in this study.

Dr. R. H. Coon, of the Department of Latin at Indiana University, who has verified the Latin translations published in this study.

Dr. Paul Weatherwax, of the Department of Botany at Indiana University, who has helped in interpretations of some botanical data bearing on this genus.

Dr. C. L. Malott and Dr. J. W. Beede, of the Department of Geology at Indiana University, who have criticized the geologic data used in the phylogenetic interpretations of Cynips.

The several curators and others of the staffs at the Museums which have made Cynips fmaterial available: especially S. A. Rohwer at the U.S. National Museum, Nathan Banks at the Museum of Comparative Zoölogy, E. T. Cresson, Jr., at the Philadelphia Academy of Natural Sciences, F. E. Lutz at the American Museum of Natural History, Isabel McCracken at Stanford University, W. J. Gerhart at the Field Museum, C. A. Johnson at the Boston Society of Natural History, E. P. (431)