268 University of California Puhlications. [Entomology 



Larval Feeding Eecords — Hippodamia convergens Guer. 

 Sacramento, 1913 



Total 243 322 232 272 386 487 263 490 438 264 363 245 



Average 18.6 23.0 17.8 20.9 24.1 25.6 20.2 23.3 24.3 20.3 24.2 17.5 



The adult feeding records were taken upon the basis of pairs 

 from storage May 2, 1914, and were continued till the death of 

 the individuals. In every case the death of the male, the date of 

 which is indicated in the table by an asterisk, took place within 

 two weeks after the beginning of the test, while the females 

 lived considerably longer. For use as a basis of comparison the 

 eight-day period from May 15 to May 23 will be taken, using 

 specimens Nos. 1, 2, 4, 5, 6, and 7. The maximum number for 

 the period was 515, the minimum 380, and the average 449 aphids. 

 The daily averages ranged from 46.6 to 64.2, giving a general 

 group average of 56.1 aphids per day. 



