INTRODUCTION vn 



years ago extensive advances have been made in all parts of the 

 subject. Full-sized textbooks have been devoted to it; notably The 

 Principles of Insect Physiology by the present author, the three 

 volume Physiology of the Insecta edited by Morris Rockstcin, and 

 Insect Biochemistry by Darcy Gilmour; and articles describing the 

 most recent advances in the physiology and biochemistry of insects 

 appear in the Annual Review of Entomology, in Advances in Insect 

 Physiology and elsewhere. References in this edition have therefore 

 been confined to such textbooks and reviews, to a few recent papers 

 which have not yet become incorporated in this way, and to a limited 

 number of other papers which provide useful starting-points for 

 further reading. 



