Bioacoustics of Philmontoides lobatus

Description. Elongate species with tegmen almost reaching end of hind femur. Prosternal spines long or of medium length; mesosternal lobes narrowly rounded, obtuse; metasternal lobes rounded with an angle or fold. Femora with the following number of spines on ventral margins: (1) 5-7 / 6-8; (2) 6 / 1-4; (3) 9-10 / 8-15; hind knee lobes bispinose; in the two males studied also knee lobes of fore femur at internal side bispinose, but second spine very small. Male. Stridulatory file in about basal two thirds with large and spaced teeth; after a sinusoidal step, teeth abruptly narrowing and becoming denser and hardly perceptible toward end; total file length 1.2 mm with 40 teeth; area with largest teeth 0.68 mm with 16 teeth; area on step 0.15 mm with 8 teeth of declining size; apical area 0.15 mm with 16 tiny teeth ( Fig. 12B ). Tenth abdominal tergite vaulted, in apical area with a narrowed, straight projection that is at end divided into a pair of downcurved, compressed and widened projections that form together an oval with open end embracing an ovoid space ( Fig. 11B ). Epiproct with swollen and convex lateral margins, with a medial furrow and slightly excised apex. Paraprocts compressed, auricular with a short, obtuse, apical projection. Cerci in basal area cylindrical and very faintly curved mediad, in about apical third divided into a narrow dorsal process terminating into a short spine and a wider ventral process that is dorso-ventrally compressed, conically narrowed and curved mediad, but in apical area it is strongly laterally compressed and divided into two rounded lobes, dorsal lobe with a curved spine at tip, ventral lobe simply rounded ( Fig. 10I–J ). Subgenital plate similar to that of P. hageni : deeply excised from base with excision terminating into a narrow furrow that little surpasses midlength of plate, afterward with indication of a faint medial carina; lateral areas ascending and along rim little curved laterad again; the subgenital plate terminates into a pair of narrow projections that are slightly curved mediad and carry at oblique apical margin the styli ( Fig. 11B ). Titillators with basal area long and narrow, running parallel but not fused with each other, at base for a short distance curved sideward, at posterior end curved moderately sideward and widened to an elongate apical branch that is curved along longitudinal axis for about 180° into a narrow, nearly parallel-sided, elongate ventro-apical surface and a short dorso-proximal surface; ventro-apical surface toward end oval and widened, just before end it carries a small disc-shaped process with granular surface and rim; sinuate lateral sclerites very stout, running from about base of apical area of titillators sideward ( Figs 14A–C ). Female. Subgenital plate similar to that of P. hageni ; elongate with a strong medial carina, downcurved and approaching lateral margins and at end divided into a pair of short angular projections; at both sides from basal lateral margins with a semi-oval lateral expansion ( Figs 17C–D ). In females with not fully hardened cuticula when collected, with a pair of shallow groves in basal half, the basal, lateral projections prolonged, followed by a distortion of the lateral margins ( Figs 17E–F ). Coloration. Scapus with internal surface brown. Vertex with three brown bands, the medial band split by a light line that can be indistinct or absent, or the vertex is dark brown with or without light spots. Pronotum with paranota dark brown with one or two light spots; disc light with or without an incomplete narrow brown medial band split in midline by a light line; anterior margin sometimes also darkened. Hind knees with a dark ring not completely reaching apex of hind femur or only with a dark spot at top.