THE MONTHLY BULLETIN. 



209 



Distribution. — Throughout the State, but abundant only in the 

 southern part, especially in the walnut orchards of Ventura County. 



Fig. 198. — Adult ashy 

 gray ladybird beetle, 

 Olla abdominalis Say. 

 (Essig, P. C. Jr. Ent. ) 



Hosts. — On many species of plant lice, but is the most effectual 

 check on the walnut plant louse, which it often entirel}^ subdues before 

 winter. 



THE EYED LADYBIRD BEETLE. 



Olla oculata Fab. 



(Cycloneda oculata Fab.) 



(Fig. 199.) 



General Appearance. — The adults of this species are often mistaken 

 for the two-stabbed ladybird {Chilocorus hivulnerus). They are 

 somewhat larger with the spots on the wing covers reddish-yellow and 

 larger. The head and lower edges of the thorax are also reddish-vellow. 



Fig. 199. — The eyed ladybird beetle, 

 Olla oculata Fab. (Original. Drawing 

 by Birdnekoff.) 



Distribution. — Quite common throughout the State and most abun- 

 dant in the central and southern parts. 



Hosts. — This species feeds upon scale insects. 



