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Acknowledgements

Many people have helped with this project. Researchers who have been of assistance include G. B. Edwards, Wayne Maddison, Jon Reiskind, W. David Sissom, and Mike Draney. This work would not have been possible without the contributions of Don Lowrie, W. J. Gertsch, Vince Roth, and Martin Muma, all now deceased. Our debt to Vince Roth especially, not just for records, but for understanding and encouragement, can never be repaid. We are also indebted to Jillian Cowles of Tucson, Arizona, for allowing us to use many of her excellent spider photographs.