Mystron flavospinus Montealegre-Z. & Morris, 1999

(1 male recorded) Only one male was successfully recorded (at 21°C, in Canada) though this species is abundant at Baeza and many were captured. Other casually monitored specimens did not sing in captivity. The singer produced a succession of calls readily audible to the unaided ear. The calls are zips, Sounds shorter than 1s that create the impression of infrastructure. The average for zip intervals measured at 21.5°C was 28s, giving this species a very low duty cycle.

Pulses are rapid-decay and transient, <2 ms in duration. Each zip (Fig. 34A) is a ragged series of 4-5 pulse trains comprised of only 2 or 3 pulses/train until the call ends in a last and much longer train of 7-8 pulses (Fig. 34B). The pulses of the final train are slightly more sustained than those earlier, though still quite short (-2 ms). The record of Fig. 34 B is from a different call of this male than that shown in Fig.
4 A.
The power spectrum is a band of energy 8-40 kHz wide with a strong peak near 12 kHz and another, marginally more intense, at about 25-27 kHz (Fig. 34 C,D). An appreciable amount of this insect's sound lies within the range of human hearing but its ultrasonic energy predominates. [1]

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