I. General.- Acknowledgments.- Historical Review.- Some Nomenclatural Considerations.- The gender of Aphytis.- Transliteration of Russian names.- Collecting and Mounting Specimens.

- Developmental History.- The egg.- The larva.- The pupa.- Emergence of the adult.- Duration of development.- Reproductive Biology.- Adult Behavior.

- Sexual behavior.- Host selection and oviposition.- Host-feeding.- Ecology.- Host population regulation.- Distribution and abundance.- The effect of physical factors.- The effect of biotic factors.

- Economic Importance and Utilization.- Utilization in biological control.- Role of Aphytis in the development of biological control.- Systematics.- Family Aphelinidae.- Genus Aphytis Howard.- Key to Aphytis and closely related genera.- List of Aphytis species.

- Subgeneric classification.- Some Zoogeographical Considerations.- Phylogeny.- Morphology of Adults.- The head and its appendages.- The mesosoma.- The gaster.- The legs.

- The wings.- Sexual dimorphism.- Intraspecific Variation and Evaluation of Taxonomic Criteria.- Notes on measurements.- Biosystematic Studies.- Developmental characteristics.- Other biological characteristics.- Cytological characteristics.

- Reproductive characteristics.- Ethological characteristics.- Biochemical characteristics.- Conclusion.- Key to Species.- II. Specific Descriptions.- I.

The vittatus group.- Plates.- II. The chilensis group.- Plates.- III. The proclia group.- Plates.

- IV. The mytilaspidis group.- Plates.- V. The lingnanensis group.- Plates.- VI. The chrysomphali group.

- Plates.- VII. The funicularis group.- Plates.- VIII. Unassigned species.- Plates.- Unrecognizable, dubious and unknown species.

- Plates.- Appendices.- References.- Index to Animal Names.- Index to Plant Names.