Dr. Rowland M. Shelley is Curator of Terrestrial Invertebrates at the North Carolina State Museum of Natural Sciences in Raleigh, North Carolina, P.O. Box 29555, Raleigh, NC 27626-0555.

Acknowledgements: I thank my colleagues R. L. Hoffman, U.S.A., and H. Enghoff, Denmark, for suggestions on the text and advice on certain topics. I also thank my friends and colleagues who assisted with the illustrations, by either taking photos or donating ones from their personal collections: H. Ellis, Z. Korsos, J. Page, and the late D.L. Tiemann and N.B. Causey. The line drawings were prepared by R.G. Kuhler, North Carolina State Museum of Natural Sciences Scientific Illustrator. --Dr. R.M. Shelley