I Morphology and Biosystematics.- The Fruit Fly Biosystematic Information Data Base.- Mitochondrial DNA Variation in Anastrepha fraterculus.- Evolutionary Patterns in Specialist and Generalist Species of Anastrepha.- Evolutionary Biology of Certain Chilean Rhagoletis Species.- Scanning Electron Microscopy and Its Taxonomic Significance in Fruit Flies.- Taxonomy, Distribution, and Natural Host Plants of Anastrepha Fruit Flies in Mexico.- Fruit Flies in Belize, Central America.- Occurrence and Distribution of Anastrepha in Melon Production Areas in Brazil.- Morphology and Histology of Salivary and Pleural Glands of Anastrepha from Brazil.- II Physiology.- The Endocrine System of the Tephritidae.- Egg Development in Anastrepha suspensa: Influence of the Ecdysone Agonist, RH 5849.- III Genetics.- Recent Advances and Future Directions in Tephritid Population Genetics.- Effect of Phenology on Allele Frequency Divergence in Apple Maggot Fly Populations.- Drosophila melanogaster as a Model System for Fruit Flies of Economic Importance: The Vitelline Membrane Protein 32E Gene Regulatory Sequences.- Molecular Genetic Studies of Tephritid Species in Hawaii.- Molecular and Genetic Studies of Alcohol Dehydrogenase of Ceratitis capitata.- Genetic Method for Separation of Males and Females of the Mediterranean Fruit Fly Ceratitis capitata, Based on Pupal Color Dimorphism for Mass-Rearing Applications.- Stability of a Double Translocation Strain in Ceratitis capitata.- Yellow: A New Mutant in Ceratitis capitata.- Field Evaluation of a Medfly Genetic Sexing Strain in Hawaii.- IV Ecology.- The Study of Movement in Tephritid Flies: Review of Concepts and Recent Advances.- Recent Advances in the Demography and Invasion Biology of Fruit Flies: A Summary.- Demography of Anastrepha Fruit Flies: A Case Study of Three Species of Economic Importance.- The Parasitoid Complexes of Frugivorous Fruit Flies of Central Europe.- Seasonal Variation of Medfly Occurrences in the Continental United States.- Relationship Between Host Plant Fruiting Phenology and Ceratitis capitata Distribution and Abundance in Hawaii.- Studies on the Complex Interactions Between Anastrepha Fruit Flies and Microorganisms.- Infestation and Injuries Caused by Fruit Flies in Citrus Orchards of the State of Sao Paulo, Brazil.- Population Distribution of the Oriental Fruit Fly in the Highlands of Northern Taiwan.- V Behavior.- Levels of Quantitative Investigation of Tephritid Fly Foraging Behavior.- Uptake of Plant Surface Leachates by Apple Maggot Flies.- Sexual Selection in Tephritid Fruit Flies and Its Implication in the Sterile Insect Release Method.- Mating and Oviposition Behavior of Anastrepha grandis Under Laboratory Conditions.- Mating Competitiveness of Wild and Laboratory Mass-Reared Medflies: Effect of Male Size.- Female Medfly Refractory Period: Effect of Male Reproductive Status.- Female Medfly Refractory Period: Effect of First Mating with Sterile Males of Different Sizes.- VI Chemical Ecology and Trapping.- Current Research on Fruit Fly Host Marking Pheromones.- Understanding Olfactory Attraction in Anastrepha Using A. ludens as a Model System.- Chemical Ecology of the Papaya Fruit Fly.- Prediction of Ceratitis capitata Captures Based on Climatic Factors.- Influence of Habitat on Ceratitis capitata Response to Trimedlure Traps.- Relative Effectiveness of Jackson and McPhail Traps: A Year-Long Comparison in Coffee in Guatemala.- Efficiency of Trimedlure for Medfly Trapping.- Improving Medfly Capture Efficacy in Jackson Traps.- Improving Fruit Fly Trapping Systems in Reunion Island.- Evaluation of Attractants to Trap Anastrepha Fruit Flies in Maracay, Aragua, Venezuela.- Attractiveness of Three Hydrolyzed Proteins to Ceratitis capitata.- VII Rearing and Quality Control.- Technology Transfer and Medfly Mass Production.- Mass-Rearing of Larval Fruit Fly Parasitoids in Hawaii.- Description of the Medfly Mass-Rearing Process at the San Miguel Petapa, Guatemala, Plant.- Mass-Rearing, Quality Control, and Male-Only Sterile Insect Technique Application with a Pupal Color Genetic Sexing Strain of the Mediterranean Fruit Fly.- Ten Years of Successful Medfly Sterile Mass Production at Metapa, Chiapas, Mexico.- Implementation of the Starter Diet Technique for Medfly Mass- Rearing at Metapa, Chiapas, Mexico.- Colonization and Establishment of Anastrepha serpentina for Mass-Rearing: Preliminary Results.- Adaptation of Anastrepha ludens to an Enriched Recycled Diet.- Process Control for Medfly Mass Production at San Miguel Petapa, Guatemala: A System Approach.- Field Evaluation of Quality: Release-Recapture of Sterile Medflies of Different Sizes.- Gamma Radiation Affecting Pupation and Emergence Rates in the Medfly and the South American Fruit Fly.- Optimum Dosage for Irradiating Anastrepha obliqua Pupae to Obtain Highly Competitive Sterile Adults.- VIII Management and Control.- Fruit Fly Control and Eradication Program Management: Factors Influencing Action Criteria and Program Design.- Biological Control of Tephritid Fruit Flies by Inundative Releases of Natural Enemies.- Automatic Information Systems to Process Data from Field Operations in Fruit Fly Control Programs.- Fruit Fly Eradication in Hawaii: Environmental Considerations for Unique Island Ecosystems.- Efficacy of Sterile Release of Anastrepha suspensa Adults Against Wild Populations.- Eradication of the Melon Fly from the Okinawa Islands in Japan: I. Estimation of Population Density and Number of Sterile Flies Required for Eradication.- Elucidating the Biochemical Bases for Host Plant Selection and Manipulating Resistance to Tephritids.- Irradiation as a Quarantine Treatment for Mexican Mangoes.- Thermal Death Kinetics: Importance in Development of Heat-Based Quarantine Treatments.- Use of a Mixture of Boric Acid, Borax, Hydrolyzed Protein, and Water to Control Anastrepha Fruit Flies.- Control Technique of Melon Fly, Dacus cucurbitae, by Using Mixed Cuelure.- A Selective Chemical Control Method for the Mediterranean Fruit Fly in Guatemala.- Soybean Protein Hydrolysate Bait for Medfly Control.- Monitoring and Control of Fruit Flies by Pheromone Traps in Guava and Mango Orchards.- Intensive Gathering of Potential Fruit Fly Hosts to Obtain Biological Material and as a Cultural Control Method.- IX Action Programs.- The Role of International Organizations in Support of Fruit Fly Action Programs.- Detection of Exotic Fruit Flies in the United States.- The 1989/1990 Mediterranean Fruit Fly Eradication Program in California.- Citrus Production Areas Maintained Free of Caribbean Fruit Fly for Export Certification.- Fruit Fly Eradication Research Programs in Hawaii.- National Plan Against Fruit Flies in Mexico.- Medfly Program in Guatemala and Mexico: Current Situation.- Pilot Eradication Project for the Carambola Fruit Fly in Coronie, Suriname.- Free Zone Program of Anastrepha grandis in Ecuador.- A Central American Program for Fruit Fly Control.- Control of Fruit Flies in the Tropical Regions of Asia.- The Eradication of the Melon Fly from the Okinawa Islands, Japan: II. Current Control Program.- X Fruit Fly Problems: A View from Industry.- California Fruit Industry Comments Regarding Fruit Fly Research.- Florida Citrus Industry Comments Regarding Fruit Fly Research.- Species Index.- Author Index.