CONTENTS. 
Page. 
The Nematin,e of North America 7 
Introduction 7 
Geographical distribution 7 
Food-plants « 7 
Life history and habits 7 
Range of species and economic importance 9 
Difficulties arising from confusion of species and loss of types 9 
Sources of material 10 
Structure and terminology 10 
Classification 17 
Table of genera 18 
Genus Cladius 19 
Trichiocampus 20 
Priophorus 20 
Camponiscus 20 
Anoplonyx 20 
Euura 20 
Pontania 20 
rteronus 41 
Amauronematus 75 
Croesus *_ 86 
Holcocneme 87 
Nematus 87 
Pachyncmatus 91 
Micronematus 110 
Lyga^onematus Ill 
Pristiphora 113 
Gynmonychus 122 
Dineura 125 
Hemichroa 125 
Appendix: Description of species the types of which are lost or inaccessible. . 126 
Index to genera and species 133 
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