162 
Psyche 
[June-September 
peak, suggesting the operation of a sharply-tuned (high Q) tegminal 
resonator (Sales & Pye, 1974). 
In the figured C. strepitans male (Figure 7), the dominant peak 
centers on 12.7 kHz and there are very weak second and third 
harmonics near 25 and 38 respectively. The C. buckelli specimen has 
its principal peak near 13.3 kHz and a lesser peak occupies the range 
28-30 kHz. Like Spooner (1973) we obtained 13 kHz as the 
dominant carrier frequency of C. monstrosa. 
Sound level measurements were obtained with the ‘/^'microphone 
and the 2204 meter, the latter on ‘linear, fast’ setting. At 5 cm dorsal 
aspect, the sound level of C. strepitans (76-7) was between 100.5 and 
101.0 dB. A specimen of C. buckelli (76-3) was 102 ± 2 dB at 6.5 cm 
dorsal. 
Pulse rate varies linearly with temperature (Figure 8) as in other 
acoustic Ensifera (Walker 1962, 1975). Both field and laboratory 
recordings of calling song contributed to the regression lines. One C. 
monstrosa plotted point is from Spooner (1973) (S in Figure 8); 5 
Figure 7. Calling song frequency spectrograms traced from photographs. 
