54 
Psyche 
[Vol. 90 
Acknowledgements 
Many persons have contributed in varying ways to this paper. I 
would like to begin by thanking Professor Frank M. Carpenter for 
his superb advice and guidance. 1 thank him for his demanding 
sense of scholarship, his never failing encouragement of my re- 
search, and his incredible ability to understand even my most pecul- 
iar idiosyncrasies. In honor of his 80th birthday, and in recognition 
of his role as friend, mentor, and adviser, I dedicate this paper to 
him. 
Robert Mawhinney is a special person and Harvard colleague 
who deserves thanks for his keen, theoretical mind and inspirational 
nature, both of which he has so willingly shared with me. I thank 
him for the spirit with which he has gauged my progress and has 
offered many helpful, insightful, and nonambiguous suggestions. 
Professor James Wilkinson of the History and Literature De- 
partment at Harvard has shown strong interest in the Geraridae and 
provided encouragement and editorial assistance whenever needed. 
His enthusiasm for paleoentomology and his support of my work 
have meant a great deal to me. 
Dr. E. S. Richardson, Jr., of the Field Museum was particularly 
helpful in sending unidentified material to me for examination; 
without this material this revision would have had little significance. 
His warm and enthusiastic support of my research is gratefully 
appreciated. His premature death is a great loss to many of us. 
Professors W. L. Brown, J. L. Cisne, and G. C. Eickwort of 
Cornell University read an earlier draft of this manuscript and 
offered many excellent suggestions for its improvement. 
Beverly Strassmann, Dr. Naomi Pierce, and Professors Ruth Tem- 
ple and Geneva Sayre are colleagues and friends who provided en- 
couragement and support at the right times. They are appreciated in 
many ways. 
Dean John Wootton of Cornell University offered assistance and 
advice when they were most needed. I am grateful to him for this. 
K. M. Horton provided invaluable typing and editing skills. Her 
standards of excellence have greatly improved this manuscript and I 
am grateful for her support. 
The staff at the Institut de Paleontologie in Paris were warm, 
helpful, and hospitable during my visit there. In particular, I would 
like to thank Dr. J. C. Fischer (Directeur), Mme. Yvette Gayrard, 
