Bioacoustics of Xenogryllus eneopteroides

Redescription. Species of average size ( Fig. 1 A–C), coloration gray brown little contrasted. Eyes large, lateral, occupying almost half of head height in lateral view ( Fig. 3 A–B). Face almost flat in lateral view, with typical whitish mask underlined by a black line below eyes and on mandibles. Pronotum dorsal disc strongly carinated laterally ( Fig. 3B ), coloration dark brown or brown, most often with a median dark brown band extended laterally near anterior margin, forming a T shape; lateral lobes almost homogeneously dark brown. First article of antennae dark brown. Male. FWs very wide, dark coloration anterior to 1A including angle of 1A ( Fig. 5A ). File with 658 stridulatory teeth (n=2) on transverse part of 1A. Harp longer than wide. Cell c1 narrowed posteriorly, its fusion with cell b1 slightly shorter than its individualized part. Cell c2 large, d2 long and narrow. Mirror large, wider than long and little rounded, its inner angle forming an angle. Apical field short, wider than long, including four or five cell alignments. Male genitalia ( Figs 7 A–C, 8A–B): Pseudepiphallic lophi as long as rest of pseudepiphallic sclerite, forming a long rectangle, sometimes slightly widened preapically; lophi with a narrow membranous inner margin setose basally ( Fig. 8 A–B); their bases fused until mid-length; apex pointed and divergent, ended by a thin lamella without hook-like inner dorsal expansion (in dorsal view, anterior base of lamella suggests that lamella may partly correspond to modified inner dorsal expansion of other species); ventral blade of lophi without longitudinal wrinkles, but with a strong ventral transverse carina, as in X. mozambicus n. sp. Pseudepiphallic parameres with a strong rectangular ventral lobe and a basal membranous lobe. Rami strong, their apex forming wide convergent hooks. Ectophallic apodemes strong, not lamellate. Ectophallic lateral expansions, lateral sclerites of ectophallic fold and endophallic sclerite partly fused, forming a wide ventral sclerotized plate, trifid apically; endophallic apodemes made of wide lateral lamellas and a narrow dorsal crest. Female: ( Fig. 1C ). Dorsal disc of pronotum almost rectangular, its posterior margin slightly bisinuate. FWs dorsal field with 7–10 longitudinal veins (m=8, n=10). Subgenital plate with a shallow apical indentation ( Fig. 9A ). Ovipositor ( Fig. 10A ) very short, about one third of FIII length. Female genitalia. Copulatory papilla ( Fig. 11 A–B) conical and narrow, its apex rounded; well-sclerotized except base and apex. Life history traits. According to Chiffaud & Gillon (1984), X. eneopteroides is found in Ivory Coast at the end of the dry season, in parts of savannah protected from fires. Their study revealed that the species feeds only on leaves and flowers of dicotyledones which are specific to savannah. Calling song. According to the sonogram showed in Desutter (1983), analyzed by Robillard & Desutter- Grandcolas (2004a, 2011), the calling song of X. eneopteroides is a short echeme made of five long syllables (syllable duration = 65 ms, period = 106.5 ms. Echeme duration = 611 ms, echeme period = 1062 ms. The dominant frequency is low (3.6 kHz) and corresponds to the first peak of the spectrum. Measurements. See Table 2 .