1971] 
Sheldon & MacLeod — Chrysopidae 
1 1 1 
ment placed on females. All measurements of ovarioles and oocytes 
were made in isotonic NaCl Ringer’s solution. The results were 
analyzed using Student’s t test. 
Field observations of feeding behavior were carried out at night 
in both forest edge and field communities using a Burgess “Safari 
Light” with a “cool white” bulb for illumination. This method 
has the advantage over a regular flashlight of uniformly illuminating 
a broad area rather than casting a narrow beam. A few individuals 
seemed to be disturbed by this procedure as they took wing and flew 
toward the light; however most were apparently undisturbed and 
seemed to continue their normal activities. 
Results 
Analysis of Gut Contents. Honeydew, a secretion emitted from 
the anus of various Homoptera, consists largely of unabsorbed plant 
sap to which certain excretory products may be added by some 
species. From the leaf washings we found that many foreign objects 
are rapidly trapped in honeydew, the most obvious of these being 
minute, nonorganic fragments such as small particles of rock, and 
such other objects as pollen grains, spores of various types, and 
portions of insect cuticle (particularly exuviae of aphids and lepi- 
dopteran scales) . The quantity of pollen present varies in propor- 
tion to the amount being produced in the near vicinity. Also directly 
associated with the honeydew are sooty-molds (Dematiaceae) grow- 
Figures 1-4 
Photomicrographs of selected areas of the midgut contents of species of 
ChrysoPa illustrating the principal types of digestive debris found in C. 
carnea and in the predaceous species C. nigricornis and C. oculata. All 
figures are prints from polaroid negatives made through a Zeiss Photo- 
microscope using phase optics. The scale lines in figs. 1, 3, and 4 repre- 
sent 0.1 mm. The scale of fig. 3 is the same as that of fig. 4. 
Fig. 1 . Acer saccharum pollen from C. carnea. The gut contents of this 
individual consisted almost exclusively of this single species of pollen. 
Fig. 2. Residue of honeydew feeding from C. carnea. Visible are fruiting 
bodies of sooty-molds of the genera Helminthosporium and Alternaria , 
pollen grains, and a lepidopteran scale. Also visible are setae derived 
from integumental grooming. Fig. 3. Cuticular remains, mostly antennal 
fragments, from C. nigriconrnis. Also present are a few scattered pollen 
grains and fruiting bodies from the sooty-molds Alternaria and Fumago. 
Fig. 4. Cuticular remains from C. oculata, including the tarsal tips and 
pre-tarsal claws from several legs and antennal fragments. A few pollen 
grains are also visible. In both figs. 3 and 4 the irregular dark objects 
are the fragments of darkly pigmented cuticle. 
Abbreviations: P — pollen grain; Se — seta; Sc — -lepidopteran scale; 
SM — fruiting body of a sooty-mold. 
