1914] Life History of Lady Beetles. = i ae 
average size, however, would be nearer 30 to 50. A beetle in 
good laying condition would often lay one or two batches a day, 
though in the breeding cage this rate was not kept up very 
long at a time. 
The female would usually, under favorable conditions, begin 
to lay from four to ten days after emerging and continued in one 
case for one month and eleven days, and in another, the longest 
record, for two months and fourteen days. The third genera- 
tion was reached in a season in the breeding cage and both 
2nd and 3rd generation beetles went into hibernation but none | 
survived, the hibernating quarters being unsatisfactory. The 
earliest eggs obtained in the spring were found May 19, 1908; 
the first generation began to emerge June 17th, and their first 
eggs were laid June 26th. The last of this brood lived until 
September 21st. The latest record of eggs obtained was 
September 14th. That year there was much cold wet weather 
during August, which very considerably checked the egg 
laying so that the beetles would very probably have laid for 
at least a month later under favorable conditions. 
Records on the feeding capacity of both larvae and adults 
were taken as follows: One larva ate 595 and another 621 
aphids during the entire larval period. The lice used in these 
counts were of all ages and sizes. One ate C. negundinis 333, 
M. gaurae 24, P. fraxinifolii 128, and M. rosae 110, total 595; the 
other C. negundinis 445, M. gaurae 18, P. fraxintfoli 88, and 
M. rosae 70, total 621. These lice were of all sizes. It will be 
seen that C. negundinis was used more than any other one 
species. One larva made the following records on single day 
counts: during the first instar, 30 C. negundinis in a day; 2nd 
instar, 84 C. negundinis; 3rd instar, 100 C. negundinis in a day. 
These were days when all was favorable and the larva was on 
full feed. An adult female when in best condition ate 200 A. 
heliantht in a day. 
The plant lice used for feed were the same as used for H. 
convergens. This species seems to be just as general a feeder 
as H. convergens and, being somewhat larger, would naturally 
be expected to consume a few more lice, but it seemed to be 
more delicate in constitution so that it succumbed more easily 
to unfavorable conditions in the breeding cage. This species 
was affected by the same injurious influences as were mentioned 
for H. convergens. 
