The fourth volume of this series Acarorum Catalogus is devoted to the superfamilies Myobioidea (fam. Myobiidae) and Pterygosomatoidea (fam. Pterygosomatidae). About 693 sp. are listed therein, with synonymies and citations in various papers. Acarorum Catalogus, Volume 4 also contains a list of by-country distributions and lists of authors who published on any known species of Myobiidae and Pterygosomatidae. There are also lists including hosts of these mites. The bibliography consists of more than 580 titles. Other volumes of the same series on the patterns of the first three are under way.
Superorder Acariformes 6
Order Trombidiformes 6
Superfamily Myobioidea 6
The Mite Family Myobiidae 6
Composition of Myobiidae 8
Catalogue of Myobiidae 11
Index of Myobiidae 121
Distribution of Myobiidae 130
Hosts of Myobiidae 142
Bibliography of Myobiidae 163
The Mite Superfamily Pterygosomatoidea 187
The Mite Family Pterygosomatidae 187
Composition of Pterygosomatidae 189
Catalogue of Pterygosomatidae 190
Index of Pterygosomatida 225
Distribution of Pterygosomatidae 229
Hosts of Pterygosomatidae 234
Bibliography of Pterygosomatidae 242
Acknowledgements 251