[Vol. 92 
404 
Psyche 
Figure 5. Naiad exuviae collected during May and June, 1984, showing yearly 
pattern of emergence of Acroneuria carolinensis. 
habits. Plecopterans (X = 1, %FO = 15.9) and ephemeropterans (X 
= 1, %FO = 12.5) made up the principle components of the diet. 
Dipterans were important components in the winter and summer, 
while trichopterans became important in the summer. A phoretic 
relationship between A. carolinensis naiads and a chironomid midge 
was observed on 3.7 percent of the naiads examined. Emergence was 
between 1 June and 16 June; peak emergence occurred on 8 June 
1984. Direct egg counts for adult females ranged from 10 to 800 eggs 
(X = 239) per female. There was little correlation between body 
length and number of eggs (r = 0.56). Mean egg length was 0.43 mm 
(range 0.38-0.48) and mean egg diameter was 0.33 mm (range 
0.29-0.38). 
Acknowledgments 
The authors are especially thankful to the following persons for 
help in this investigation: Dale Adkins, Dean Adkins, Allan Brant, 
