Acknowledgments
The author is deeply indebted to Dr. H. Mano (Department of Clinical
Dietetics and Human Nutrition, Josai University, Saitama, Japan) for his
invaluable technical advice in the preparation of figures. The author also
thanks the following individuals for their assistance in collecting materials for figures: Dr. M.J. Loeb (Insect Biocontrol Laboratories, United
States Department of Agriculture, Beltsville, MD), Dr. E. Furuta (Institute of Comparative Immunology, Saitama, Japan), Dr. A. Machii (Otsuki
Pearl Laboratory, Mie, Japan), Dr. M. Awaji (National Research Institute
of Fisheries Science, Kanagawa, Japan), Dr. N. Ishibashi (Saga University,
Saga, Japan), Dr. N. Ogura (Forest Research Institute, Ibaraki, Japan), and
Dr. Y. Chinzei (Mie University, Mie, Japan).