CONTENTS. 



Page. 



Preface 7 



Inlrfxliiction 7 



Synopsis of superfamilies 17 



Synopsis of families 18 



Eupodoidea 20 



Eupodidse 20 



Cn-ptognathidae 23 



BdelUdae 23 



Trombidioidea 26 



Cheyletidae 26 



Anystidaj 30 



Tetranychidae 32 



ErythriBidae 38 



Trombidiidae 41 



Ca^culidae 45 



Ilydrachnoidea 45 



llydnu'hnidaj 45 



Ilalacaridse 54 



Ixodoidea 56 



Parasitoidea 70 



Spcl;corhynchida3 70 



HolothyridiJO 70 



Page. 



Parasitidae 71 



Oribatoidea 90 



Oribatidae 95 



Hoplodermatidae 102 



Labidostommatidae 103 



Sarcoptoidea 104 



Tarsonemidte 104 



TyrogljT)hidEe 109 



Canestriniidae 118 



Analgesidae 119 



Listrophoridae 126 



Sarcoptidae 128 



Cytoleichidae 133 



Demodicoidea 134 



EriophyidaD 134 



Demodicidae 139 



Opilioacaridse ^ 140 



Uncertain Acari 140 



Collecting, preparing, and rearing mites 141 



List of works useful in the study of American 



Acarina 143 



Index and generic synonjTny 147 



