We would like to thank the following people for various types of assistance provided during the preparation of this work: John Aitchison, Norm Anderson, Nick Arnold, Dennis Braman, Kenton Chambers, Peter Cranston, Bryan Danforth, Jim Davis, Jane Gray, Penny Gullan, Grand Huang, R. L. Jacobson, Alexander Kirejtshuk, Bob Mason, Raif Milki, Cheryle O'Donnell, Ted Pike, Barry Roth, John Ruben, Ryszard Szadziewski, Sam Telford Jr., Jack Tkach, and Charles Wellman. Special thanks are extended to Alex Brown for assistance in locating amber specimens, Ron Buckley and Scott Anderson for loaning specimens from their Burmese amber collections, and Art Boucot for stimulating discussions. All specimens illustrated here are deposited in the Poinar amber collection maintained at Oregon State University except for the following: specimen in color plate 6A is from the Scott Anderson collection; specimens in color plates 5E, 8A, 12D, 13C, and 15A are from the Ron Buckley collection; specimens in color plates 2C, 5A, 5B, 6B, 6D, 7C, 9B, 11D, 12B, 13A, 13B, and 15B are from the Royal Tyrrell Museum, Alberta, Canada; and the flower in color plate 14A is from the Grand Huang collection. Design templates are by Greg Poinar.

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