CONTENTS 



PAGE 



INTRODUCTION 63 



Lower California 63 



Itinerary . . . . . . . . . . .64 



Characteristics of the scale insect fauna 64 



Types 68 



Acknowledgments ... . . . . . .68 



SYSTEMATIC TREATMENT . .69 



Genus Icerya ..... ..... 69 



Genus Steatococcus ........ 69 



Genus Orthezia . . . . . . . .71 



Genus Asterolecanium ........ 72 



Genus Dactylopius ........ 74 



Genus Eriococcus ......... 74 



Genus Fonscolombia ........ 78 



Genus Xerococcus 80 



Genus Kermes 81 



Genus Ehrhornia ......... 82 



Genus Pseudococcus ... ..... 82 



Genus Trionymus ......... 84 



Genus Phenacoccus .... ..... 84 



Genus Puto . 86 



Genus Erium .......... 86 



Genus Tachardia ......... 86 



Genus Aclerda 87 



Genus Pulvinaria .... ..... 88 



Genus Lichtensia 89 



Genus Ceroplastes ......... 89 



Genus Saissetia ......... 90 



Genus Toumeyella . . . 90 



Genus Protodiaspis . . * . . .91 



Genus Ancepaspis .... ..... 93 



Genus Xerophilaspis ......... 94 



Genus Diaspis ..... 



Genus Pseudodiaspis ........ 96 



