I 



Vol. 1] Clausen. — Life-Histories of Calif ornia Cocci tiellkhu. 291 



Life-History — CycJoneda sanguinea Linn. 



Sacramento, 1913 g. 



o ce ^ 



a <« >-. 



£ 52. tc}p 



^"^ -^^ 



a> !t! 



Iz; QJJ H Jt? ^ J-S (N »-:'5 cc ^% :?— J-S w h::-^ Ho 



1 5/1 5/7 6 5/12 5 5/21 9 5/26 5 6/3 8 6/10 7 35 



2 5/1 5/7 6 5/13 6 5/21 8 5/24 3 5/29 5 6/3 5 33 



3 5/1 5/7 6 5/13 6 5/17 4 5/22 5 5/29 7 6/3 5 33 



4 6/24 6/29 5 7/3 4 7/5 



5 6/24 6/29 5 7/3 4 7/5 



6 6/24 6/29 5 7/3 4 7/5 



7 6/24 6/29 5 7/3 4 7/6 



8 6/24 6/29 5 7/3 4 7/5 



9 6/24 6/29 5 7/3 4 7/6 3 7/8 2 7/13 5 7/16 3 22 

 10 6/24 6/29 5 7/3 4 7/5 2 7/8 3 7/13 5 7/17 4 23 



Average 5.3 4.5 3.7 3.2 4.9 4.2 25.3 



Feeding Hahits. — Complete feeding records were secured of 

 ten individuals for the entire larval period, and the range in the 

 number of aphids eaten was from 147 to 427, Avith an average 

 of 216 aphids for the period. The daily average, computed upon 

 the basis of approximately twenty days, was 14.5 aphids. 



The feeding tests of ten adult beetles for a period of fifteen 

 days gave a variation of from 205 to 260 aphids eaten, a rather 

 unusual uniformity. The period average was 234, and, on a 

 daily basis, 15.6 aphids. The daily individual average ranged 

 from 8 to 30, with a general average of 15.6 aphids per day. 



Larval Feeding Records — Cycloneda sangxunea Linn. 



