298 



GUIDE TO CALIFORNIA INSECTS. 



Figure 302 Male of Black scale. 



Fig-ure 305. Black scale on barbary. 



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Figure 303 Development of the male of the Black scale. 1 Second stage 2 Propu- 

 pa. 3 Pupa. 



Figure 304. 1 Different stages of Black scale. 2 Young Black scale shortly after 

 settling. 3 Eggs of Rhizobius ventralis under Black scale. 4 Hemispherical scale on 

 left and Black of same size on right. 5 Inverted Black scale with 50 eg-gs of Scutel- 

 lista. (Opposite page.) 



