Vol. 1] Clausen. — Life-Histories of California Coccinellidae. 257 



Feeding Habits. — The larvae of this species, as would be ex- 

 pected, consumed by far the largest number of aphids as com- 

 pared with those of other species during its period of life. The 

 records of thirteen individuals give a daily feeding average of 

 24.9 aphids, while for the entire period the maximum reached 

 600 and the minimum 394, the average for all individuals being 

 475 aphids during the larval period of approximately 24 days. 



The unusual number recorded for May 22-23 was due to the 

 excessive heat, all the aphids in the check vials being dead upon 

 these dates. It was not possible therefore to make a propor- 

 tionate reduction in the individual totals. 



Larval Feeding Records — Coccinella calif ornica Mann. 

 Sacramento, 1913 



