PLATE II. 



Representatives of the Principal California Families of Coccid^e. 



1. Mealy-bug [Pseiidococcus aurilanatus),en\siTged. 

 la. Same, natural size, on coleus. 



2. Mealy-hug [Pseudococcus longispinus),enla,rged. 

 2a. Same, natural size, on coleus. 



3. Orthezia insignis, enlarged. 

 3a. Same, natural size, on coleus. 



4. Black scale {Saissetia olese), female, enlarged. 

 4a. Same, natural size, on orange. 



5. Yellow scale (Chrysomphalus aurantii citrinus), ventral aspect 



of female, greatly enlarged. 



5a. Same, slightly reduced, on orange leaf. 



6. Red scale {Chrysomphalus atcrantii), ventral aspect of female, 



greatly enlarged. 



6a. Same, slightl}^ reduced, on orange leaf. 



7. Purple scale {Lepidosaphes heckii), ventral aspect of female, 



greatly enlarged. 



7a. Same, slightly reduced, on orange leaf. 



8. Cottony-cushion scale {leery a. purchasi), ventral aspect of fe- 



male, greatly enlarged. 



8a. Same, on orange twig, somewhat reduced, 



