Contents 



PREFACE Vii 



I INTRODUCTION J 



II GENERAL CHARACTERISTICS OF THE SENSORY 



SYSTEM 5 



III MECHANORECEPTION 26 



The Tactile Sense-Sensilla Trichodea - Proprioceptors - 

 The Role of Mechanoreception in Locomotion - 

 Responses to Gravity 



IV SOUND RECEPTION 77 



Tympanic Organs - Hairs as Sound Receptors - The 

 Johnston's Organ of Culicidae - Perception of Vibra- 

 tions in Solids 



V CHEMORECEPTION 112 



The Receptors - Olfaction - Contact Chemoreception 



VI RESPONSE TO HUMIDITY 156 



VII PHOTORECEPTION 162 



The Compound Eye - Colour Vision - Polarized Light 

 - Form Perception - Ocelli - Stemmata 



REFERENCES 214 



INDEX 256 



