278 



University of California Publications. [Entomology 



Larval Feeding Records — OJla ahdominalis Say — (Continued) 



Sacramento, 1913 



Total 250 196 240 263 205 259 238 256 254 231 258 246 240 231 



Average 19.2 15.0 18.6 20.2 17.0 19.9 18.3 19.6 21.1 19.2 23.4 22.3 21.8 21.0 



In the adult feeding records, complete data were secured for 

 nine individuals, six of which were females. For the entire 

 fifteen-day period the number of apliids consumed daily ranged 

 from 16 to 47, with an average of 30.4 aphids per day. The 

 period totals varied from 407 to 534, averaging 457 aphids for 

 the entire series. 



Medium-sized rose aphids (Macrosiplium rosae) were used 

 for feeding purposes throughout this experiment. 



