| Page | Foreword | iii | List of Plates | vii | List of Illustrations | viii | | I. | Introduction | 1 | | Historical | 2 | | Methods | 4 | | Future work | 5 | | Illustrations | 7 | | II. | Species of cockroaches | 7 | | III. | Ecological relationships | 14 | | Cave habitats | 16 | | Cavernicolous cockroaches | 17 | | Cockroaches from burrows | 23 | | Desert habitats | 25 | | Desert cockroaches | 27 | | Aquatic habitats | 30 | | Amphibious cockroaches | 31 | | Outdoor habitats | 33 | | Cockroaches from outdoor habitats | 35 | | Structural habitats | 70 | | Land-based structures | 73 | | Cockroaches associated with land-based structures | 74 | | Ships | 82 | | Cockroaches associated with ships | 85 | | Aircraft | 87 | | Cockroaches associated with aircraft | 88 | | IV. | Classification of the associations | 91 | | V. | Mutualism | 96 | | Bacteroids | 96 | | | Cockroaches in which bacteroids have been found | 99 | | Bacteria | 100 | | Protozoa | 101 | | VI. | Viruses associated with cockroaches | 103 | | VII.
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