Vol. 1] Clausen. — Life-Histories of California Coccinellidae. 287 



The consumption of aphids by the ten adult beetles under 

 observation ranged from 215 to 305, with an average of 251 

 aphids for the fifteen-day period. The largest number eaten in 

 one day was 30, while the general daily average was 16.7 aphids. 



Medium-sized rose aphids {Macrosiphum rosae) were used 

 exclusively. 



Average 13.7 14.5 14.8 13.3 13.2 15.3 14.6 15.4 13.3 12.9 



Adult Feeding Records — Adalia bipunctata Linn. 

 Berkeley, 1914 



