350 
Psyche 
[Vol. 85 
Figure 2. Regression lines, calculated from data in Table 1 . showing the effect of 
temperature on the five principal characteristics A~ E of the calls of five males (dashed 
lines) and five females (solid line) of Ch. plorahuncla. The left-hand “frequency” axis 
applies to parameters A C (strokes/sec) and to D (volleys/ min), while the right-hand 
axis for “duration” applies only to E. 
A, 
males: 
y 
= 4.I6x - 1 1.74, 
r-’ = 0.96 
females: 
y 
= 4.37x - 18.79, 
r2 = 0.95 
B, 
males: 
y 
= 2.57x+ 7.89, 
r2 = 0.88 
females: 
y 
= 2.77x- 0.55, 
r2 = 0.92 
C, 
males: 
y 
= 0.87x + 21.66, 
r^= 0.69 
females: 
y 
= l.OIx + 15.40, 
r2 = 0.74 
D, 
males: 
y 
= 3.l2x - 27.85, 
r-^ = 0.81 
females: 
y 
= 3.44X - 32.32, 
r^= 0.88 
E, 
males: 
y 
= -40x + 1650, 1 
2 = 0.80 
females: 
y 
= -37x + 1580, 1 
= 0.89 
