CONTENTS. 
Page. 
Contributions Toward a Monograph of the American Aleurodid^e. 
Introduction 9 
Family Aleurodidie 11 
Genus Aleurodes 11 
Table of the American species of Aleurodes 12 
Genus Aleurodicus 43 
Table of species of Aleurodicus 43 
The Red Spiders of the United States [Tetoranychus and Stigmueus) . 
History 65 
Structure...! 1 66 
Habits 69 
Important American bibliography 70 
Tetranychidse 70 
Tetranychus Dufour 70 
Siigmseus Koch 77 
Index of Genera and Species 79 
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