Chapter 1: The Cyclorrhaphan larva.- Chapter 2: Acquiring data: targets, problems and solutions.- Chapter 3: Forms, functions and names.- Chapter 4: Mobility and locomotion.- Chapter 5: Respiration.- Chapter 6: Saprophagy, developing on decay.- Chapter 7: Phytophagy and mycophagy.- Chapter 8: Zoophagy: predation and parasitism.- Chapter 9: The Cyclorrhaphan larva as a data source.