A SYNOPSIS 



OF THE 



APHIDIDAE OF CALIFORNIA 



BY 



ALBERT F. SWAIN 



CONTENTS 



PAGE 



Introduction 2 



Classification 4 



External anatomy 5 



Biology 8 



Economic considerations 9 



Synopsis 10 



Family Aphididae 10 



Subfamily Aphidinae 11 



Group Callipterina 12 



Tribe Phyllaphidini 12 



Tribe Callipterini 16 



Tribe Chaitophorini 32 



Group Lachnina 39 



Tribe Pterocommini 39 



Tribe Lachnini 43 



Group Aphidina 52 



Tribe Macrosiphini 52 



Tribe Aphidini 87 



Subfamily Pemphiginae 138 



Group Hormaphidina _ 139 



Group Pemphigina 140 



Group Schizoneurina 147 



Group Vacunina 150 



Subfamily Phylloxerinae 151 



Group Chermisina 151 



Group Phylloxerina 152 



