THE COCCIDAE OF CALIFORNIA. 



SPECIES. HOST PLANT. 



Aspidiotus juglans-regise Comst. English walnut. 



* Aspidiotus ostredsformis Curt. Pear, Apple. 



* Aspidiotus perniciosus Comst. Apple, Pear, Peach, Quince, Apri- 



cot, Plum, Hawthorn, Rose, Cur- 

 rant, Raspberry, etc. 



* Aspidiotus perniciosus albopuncta- 



tus Ckll -. Orange, Plum. (From Japan. ) 



Aspidiotus rapax Comst Willow, Holly, Ivy, Acacia, Orange, 



Pittosporum, Camellia, Palms, 

 Ferns, etc. 



Aspidiotus californicus Col. Pinus sabiniana, P. ponderosa, P. 



lambertiana, P. attenuata. 

 Aspidiotus coniferarum shastse Col. -Cupressus macnabiana. 



Aspidiotus ehrhorni Col. Under lichens on Abies concolor, 



Libocedrus decurrens. 



Aspidiotus florencide Col Pinus ponderosa. 



Pseudaonidia duplex Ckll. _ Camellia. (In Japanese nursery.) 



* Pseudaonidia pasonia Ckll Peony. (From Japan/) 



Chrysomphalus aonidum Linn. Palms. (In greenhouse.) 



Chrysomphalus aurantii Mask. Orange, Lemon, Grape-fruit, Rose, 



Cycas revoluta, and species of 

 Palms. 

 Chrysomphalus aurantii citrinus 



Coq Orange, Oleander, Palms. 



Chrysomphalus tenebricnsus Comst. . .Maple, Apple. 



Targionia bigelovise Ckll. Bigelovia brachylepis. 



*0donaspis bambusarum Ckll Bamboo. (From Japan.) 



Lepidosaphes beckii Newm Orange, Lemon, Grape-fruit, Palms. 



Lepidosaphes crawii Ckll. Quercus cuspidatus. 



Lepidosaphes gloverii Pack. Orange. 



Lepidosaphes ulmi Linn Apple, Pear, Plum, Willow. 



Parlatoria pergaudii Comst Orange. 



DESCRIPTION OF THE MORE IMPORTANT SPECIES, WITH NOTES. 



Accompanying the descriptions of the more important species in the 

 following pages will be found a number of illustrations, which will give 

 the reader a fair idea of the general appearance of the different forms 

 of scale insects, as well as a colored plate showing members of each of 

 the principal subfamilies represented in California. 



For the convenience of the County Horticultural Commissioners and 

 Inspectors, as well as of others interested in this study, a number of 

 plates have been added, showing original drawings of the last abdom- 

 2-c 



