Bioacoustics of Moncheca pretiosa

ese colours deteriorated greatly with death. Two brief calling song buzzes were recorded in the laboratory. The sound is sibilant and quavering. A PTG of two train types is repeated at a rate of 29-30/s at 24 C. The trains have very different amplitude envelopes and very similar durations (Fig. 14). Rapid decay pulses make up the trains. Several spectra were obtained from the living insect but with much aspect variation: the animal walked and turned incessantly in the analysis cage. This is a good example of a low-Q sound generating system. Energy occurs across a wide band, 20-70 kHz, with the strongest peak near 30-34 kHz. A smaller peak is evident in the high audio range but this is not a consistent feature of all spectrograms.

Diagnostic description.— General characteristics as described above. Stridulatory file of male almost perfectly straight, 1.8 mm long, with 86 narrow and relatively thick teeth, maximum width of file 84 μm ( Fig. 47 E); teeth of file uniform in thickness, evenly spaced and smoothly narrowing towards proximal end. Mirror of stridulatory apparatus with vein AA 1 only slightly oblique. Male cercus straight, cylindrical, with small, apical, hook-like tooth ( Fig. 26 G); male 10th tergite with large, dark patch but its posterior margin always lightly colored; posterior margin of tergite with wide incision ( Fig. 26 F). Ovipositor longer than hind femur (ratio ovipositor/hind femur 1.21-1.37), perfectly straight. Coloration .— Body coloration of live individuals dark turquoise green, turning light green in preserved specimens. Face shiny black; clypeus and labrum crimson red; pronotum olive green, with narrow, white band in prozona and wide one in metazona ( Figs. 26 D-E). Costal field of tegmina yellow to pink (crimson underneath), remainder of tegmina dark olive green with yellow venation. Abdomen turquoise; sometimes lower valvula of ovipositor yellow. Measurements .— Table 19 .