TABLE OF CONTENTS. 



Page. 



Introduction 1 



Morphology 3 



Head 5 



Thorax 8 



Appendages of the thorax 14 



Abdomen 15 



Locomotion 16 



Relations to other Homoptera 16 



Collecting and preserving 17 



Determinations from immature stages 17 



Acknowledgments 17 



Explanation of descriptions 18 



Systematic treatment 18 



Subfamily Liviinse 19 



Tribe Liviini 19 



Genus Livia 19 



coloradensis 20 



maculipennis 21 



marginata 21 



vemalis 22 



caricis 23 



Tribe Aphalarini 24 



Genus Rhinocola 24 



Aphalara 24 



calthae 27 



rumicis 29 



artemisise 29 



angustipennis 30 



viridis 30 



pinicola 31 



suaedee 31 



veaziei 31 



metzaria i 32 



caudata 33 



pulchella 33 



picta 33 



fascipennis 34 



alaskensis 35 



nebulosa Idncaidi 36 



Subgenus Anomocera 36 



Aphalara (Anomocera) minutissima 37 



(Anomocera) anomala 37 



Genus Aphalaroida " 38 



pithecolobia 39 



epinifera 40 



prosopis 40 



inermis 41 



acacise 41 



V 



