Psyche 
[March-June 
114 
Pollen Feeding Experiment. In all 40 of the males the sperm 
shift had taken place by day five, and no other obvious differences 
between the dietary groups were present. The results for the 
females, summarized in Table 2, show an obvious dietary effect. We 
found that both pure corn pollen and pure sucrose resulted in signifi- 
cantly less oocyte development compared to the two combined or 
to Food Wheast® alone. This was true in comparisons of the mean 
ovariole diameter, the mean number of yolky oocytes, and the mean 
number of mature eggs per female (P < 0.05 in all cases, except in 
the three cases where sx is zero and where a t test cannot be made. 
In these cases the differences are obvious.) Even though by itself 
corn pollen seems to be a poor diet, it is significantly better than 
sucrose alone with respect to the ovariole diameter and the number 
of yolky oocytes (P < 0.05 in both cases). No statistical com- 
parison was made between these two groups for the number of 
mature eggs as only a single individual (pollen fed) had matured 
any. The diets of pollen plus sucrose vs. Food Wheast® were not 
found to differ in any of the three parameters examined. 
Field Observations. The observations made in the field were 
consistent with the data derived from the study of the gut contents. 
Direct observation of the feeding of adults on pollen in the spring 
was not possible because of the low numbers of C. carnea present 
in the habitats sampled and the high frequency of nights too cool 
for extended activity of the chrysopids. During the middle of the 
summer a large number of adults were found feeding at night on 
corn pollen. They were either directly on the tassels or were on the 
leaves feeding on shed pollen which had accumulated, primarily in 
the mid-rib depression. On warm, calm nights during the peak of 
pollen production there were at times as many as two or three 
individuals per corn plant, and as many as 200-300 individuals could 
be collected in an hour. Feeding of adults on honeydew was also 
observed on several occasions during the summer. These observa- 
tions, made at night, revealed that the adults simply walk along 
leaf surfaces, stopping periodically to scrape at them. Consistently, 
a close examination of each area where a chrysopid had stopped 
revealed a concentration of honeydew. 
Discussion 
The seasonal nutritive cycle of C. carnea. The probable use of 
honeydew as a natural food by C. carnea was pointed out by both 
Hagen (1950) (who used the synonym C. calif ornica Coq. for this 
species) and Neumark (1952). That honeydew has a high food 
