Percent of Individuals 
396 
Psyche 
[Vol. 92 
Dec 
Jan 
Feb 
Ot 
2 0 fZ March 
_ Apri I 
Ot 
May 
Ju ne 
0 t 
25 C July 
Ot 
30 [I Aug 
Sept 
0 t 
20 p Oct 
o E 
25 r Nov 
□ 
On □ 
15 
□ 
19 
□ 
□ cti _ 
= D= 
14 
□ 
. — r ~ r ki^ 
17 
o n 
1 — 1 | 
— , n 
23 
1 ! 
l ~ l ~l nB D 
20 
□ 
r ! 
, , p-T"t 
20 
T 
] 
15 
27 
1 
TZZ 
i ca □ □ 0 
27 
t 
uzn 
□ 
=tl 
i— 1 *- 
1 □ C!n 
24 
Ih 
□ 
H=D c 
20 
3 5 7 9 11 13 15 17 19 21 23 25 27 
Body Length , mm 
Figure 1. Length-frequency histograms showing monthly distribution of Acro- 
neuria carolinensis naiads. 
