INTRODUCTION 7 



to see authentic material, although I believe I have satisfactorily identi- 

 fied them. Two species which have been recorded from the state, but 

 which were certainly introduced and are not now known to occur here, 

 have been passed over with a mere mention. 



TYPES 



The types of all the new species herein described are in the Stanford 

 collection. In all cases a holotype has been selected. It is perhaps not 

 out of place to urge that this method be adopted by all students of the 

 Coccidae, for even in this limited study three cases have been met with 

 in which more than one species had been included in material labeled type. 

 There is really no more reason for failure to name holotypes in this group 

 than in any other. 



