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TEXTBOOK OF 2oOLOGY 



Fig. 183. — Some common Homoptera. i. Spring- migrant of rosy apple aphid ; 2, 

 adult beet leafhiopper ; S, cottony maple scale, Pulvinaria vitis L., ventral view of 

 body ; i. Baker's mealybug, Pseudococcus maritimus Elirli, ventral view of body ; 

 5, wingless female black cherry aphid ; 6, lateral view of adult female potato 

 psyllid ; 7, San Jose scale, Aspidiotus perniciosus Comst., pygidium ; 8, purple scale, 

 Lepidosaphes becki Newman, pygidium; 9, pine scale, Chionaspis pinifoliae Fitch, 



