Bioacoustics of Rouxalna scabens

Thorax. Pronotum mostly black with wide median linear ochraceous fasciae, covered by sparse short silver hair. Pronotal collar ochraceous, and lateral parts black. Mesonotum and parapsidal suture ochraceous; submedian and lateral sigilla black; scutal depression distinct. Cruciform elevation ochraceous eXcept black anterior branches. Opercula more or less reaching margin of tympanal cavity, directed towards distomedial margin of tympanal cavity, apically broadly rounded; whitish at base becoming blackish at tip and bearing sparse silver pubescence. Wings. Fore wing hyaline; venation pale brown, becoming darker towards apical cells and ambient veins; pterostigma partly obscur. Hind wings hyaline; venation brownish. Legs. Covered by sparse short silver hair; fore femora brown to black at lateral margins. Mid and hind femora brown to ochraceous. Fore and mid tibiae dark brown, becoming blackish apically. Fore and mid tarsi and claws dark brown. Meracantha sharp, black with whitish margin, much shorter than opercula. Abdomen. Tergites covered by short silver pubescence; tergites 1 and 8 uniformly black; tergite 2 black with wide ochraceous posterior margin; tergite 3 to 7 mostly black with narrow ochraceous margin and greenish posterior margin. Sternite I to VIII uniformly brown. Timbals bearing siX long ribs; ribs 1 and 2 fused ventrally; ribs 1 to 4 fused dorsally; ribs 5 and 6 unfused ventrally and dorsally; rib 6 much shorter than other ribs; five intercalary ribs. Genitalia. Pygofer entirely dark brown to blackish; upper lobes black, roundish; lower lobes rounded, not prominent but distinct. Median lobe of uncus, blackish, flat, as long as wide. Thecal pseudoparameres slender, apically divergent, sharp. Claspers brown, unfused, distally parallel to each other; their apices affiXed; apically obtuse, not hooked. Acoustic behavior. Male calling song ( Fig. 7 ) is formed by a regular succession of phrases emitted at a rate of 4 per second. Each phrase is formed by 2 syllables: a group of 7 echemes and one isolated echeme. Frequency ranges from 5,000 to> 20,000 Hz. The dominant frequency is located between 8,000 and 11,000 Hz and the maXimum of power is located at 9,500 Hz. Description of female. Unknown.