Brachyteleutias bilineatus (Rehn, 1913)

Fig. 30G, H; 31B

Distribution: Argentina: Misiones; Brazil: Paraná.

New record for Brazil and for the Paraná State.

Comments: The individuals are nocturnal, particularly abundant, easily found on branches and twigs of bushes and small trees of the forest understory.

Bioacoustics (Fig. 30G–I): The stridulation is performed only at night. The echemes are short, with ca. one second of duration, and composed by sequences of three to six diplosyllables, each one formed by two grouped syllables. The amplitude of the first syllable is distinctly lower than the amplitude of the second, which is emitted with an abrupt increasing of intensity.

Dominant frequency: 32.4 ± 2.9 kHz.

Bandwidth: 11.3 ± 8.4 kHz.

Duration: Syllable: 0.005 ± 0.002 s.

Mute interval: Syllable: 0.01 ± 0.001 s.