4 CONTENTS 



PAGE 



Genus Heterococcus . .22 



Heterococcus arenae Ferris . . . . . . .22 



Genus Lachnodius . . , . 23 



Lachnodius salicis n. sp. . V " .' v . . ' . . . 23 



Genus Pseudococcus . . 24 



Pseudococcus ephedrae (Coq.) . . . . ... 24 



Pseudococcus gutierreziae (Ckll.) . . . . . . 26 



Pseudococcus irishi (Ckll.) . ' " : . . '. . 27 

 Pseudococcus juniperi Ehrh . : . . . . . 28 



Pseudococcus prosopidis (Ckll.) . . . . ' . . 29 



Pseudococcus lycii n. sp. . . i ' . . ... 30 



Pseudococcus steelii (Ckll.) . 31 



Genus Erium ........... 31 



Erium lichtensioides (Ckll.) . . . . . . .31 



Genus Ripersia . . . . 31 



Ripersia hilariae n. sp. . . . . . . .32 



Ripersia sporoboli Ckll. (?) .... . . . 33 



Genus Cryptoripersia ......... 33 



Cryptoripersia arizonensis (Ehrh.) . . . . . .34 



Genus Aclerda ........... 34 



Aclerda ariditatis n. sp. . . . . . . .34 



Genus Pulvinaria .......... 36 



Pulvinaria bigeloviae Ckll 36 



Genus Lichtensia .......... 38 



Lichtensia lycii Ckll 38 



Genus Philephedra 39 



Philephedra ephedrae Ckll 39 



Genus Ceroplastes 41 



Ceroplastes irregularis Ckll 41 



Genus Ceroplastodes 43 



Ceroplastodes acaciae Ckll. ....... 43 



Genus Toumeyella .......... 44 



Toumeyella mirabilis Ckll. ....... 44 



Genus Protodiaspis .......... 46 



Protodiaspis tridentata n. sp. . . . '. . .46 



Protodiaspis edentata n. sp 48 



Genus Diaspis 49 



"Diaspis" arizonica Ckll 49 



Diaspis montana Ckll. ........ 50 



Diaspis toumeyi Ckll. . . . . . . . .51 



