Contents: 1. Introduction. 2. Higher Taxa. 3. Subfamily Buchonomyiinae. 4. Subfamily Podonominae. 5. Subfamily Tanypodinae. 6. Subfamily Diamesinae. 7. Subfamily Telmatogetoninae. 8. Subfamily Orthocladiinae. 9. Subfamily Chinonominae. 10. Notes. 11. Summary .12. Acknowledgements. 13. References. 14. Taxonomic Index.