It is a great privilege and pleasure for me to write the foreword to this book, which is the result of considerable effort on the part of Dr. Makoto Matsuura and Mr. Seiki Yamane. Such an introduction might sound like a cliche, but in this case the sentiments are real, since the preparation of this book really has been a laborious task. In fact, I think it would not be an exaggeration to say that such a book could only be published once every 100 years. I would like to explain why I regard this book as unique. It is well known that as social insects hachi (as bees and wasps are called in Japanese), as well as ants and termites, have a very diffe­ rent way of life from that of other insects. Each of these three groups has its own characteristics. Ants and hachi are classified in the same category; in other words, an ant is sim­ ply a wasp which has lost its wings and its sting, and has adapted itself to an underground life. Termites, on the other hand, are an aberrant cockroach, descended from a phyletic line which is completely diffe­ rent from that of ants and hachi, which undergo complete metamor­ phosis. On the other hand, ants and termites have a common feature: all members have adopted a social life.

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