Author's Organization:Insect Toxicology and Physiology, The Institute of Physical and Chemical Research (RIKEN):(Present address) Department of Zoology, Plant Protection Institute of the Hungarian Academy of Sciences Insect Toxicology and Physiology, The Institute of Physical and Chemical Research (RIKEN) Zoological Institute, Katholieke Universiteit Leuven Zoological Institute, Katholieke Universiteit Leuven Insect Toxicology and Physiology, The Institute of Physical and Chemical Research (RIKEN)