Chicago, the Leverhulme Trust (for an emeritus fellowship awarded to Maurice Kogan which enabled a particular part of the English study to be completed) and to the Bank of Sweden Tercentenary Foundation which provided funds assisting us with the last stage of the project and its dissemination. The list of names of the editorial team on the cover of this book in no sense exhausts the account of its authorship or of those responsible for the contr- utory country studies. Our equal partners in the whole exercise have been Steve Hanney (England), Berit Askling and Susan Marton (Sweden), and Roar...

Insects as a group occupy a middle ground in the biosphere between bacteria and viruses at one extreme, amphibians and mammals at the other. The size and gen eral nature of insects present special problems to the student of entomology. For example, many commercially available instruments are geared to measure in grams, while the forces commonly encountered in studying insects are in the mil ligram range. Therefore, techniques developed in the study of insects or in those fields concerned with the control of insect pests are often unique. Methods for measuring things are common to all...