PHYSIOLOGY AND BEHAVIOR OF THE ARTHROPODA 351 



6. Describe the general features of the innervation of muscles in arthropods. 



7. What is a myogenic rhythm? 



8. Draw a diagram of an ommatidium in a day-flying insect. 



9. How did von Frisch discover color vision in bees? 



10. Describe kinesis, simple orientation and navigation. 



1 1. What is trophallaxis? 



12. With diagrams in which up is toward the top of the page, show how a bee would 

 indicate to others the direction of a food source a mile northeast of the hive (a) just 

 after dawn, (b) at noon, and (c) just before sunset. 



Supplementary Reading 



General sources of information include Prosser et al., Comparative Animal Physi- 

 ology, Wigglesworth, The Principles of Insect Physiology, and Wheeler, The Social In- 

 sects. Part of the work on insect hormones by Williams appeared in LIFE Magazine 

 (1952). Von Frisch, Dancing Bees, is a popular and informative account of bee behavior, 

 based mostly on the work of the author. 



