Bioacoustics of Philmontis murmur

Description. Small to medium sized species with tegmina surpassing abdomen and almost reaching or little surpassing knees of hind femur ( Fig. 1J ). Face of uniform color, antennal scrobae and basal segments of antennae darkened or black. Pronotum elongate; disc with anterior margin faintly concave, posterior margin broadly rounded; lateral lobes long and narrow, its deepest point in males little before mid-length, in females between mid-length and beginning of apical third; auditory swelling distinct, without humeral sinus. Prosternal spines very short to almost of medium length; mesosternal lobes obtuse; metasternal lobes rounded. Femora with the following number of spines on ventral margins: (1) 4-6 / 3-7; (2) 4-6 / 0-2; (3) 9-11 / 0 (n = 6); hind knee lobes with a single spine at both sides. Male stridulatory file on underside of left tegmen (n = 1): total length 1.05 mm ; area with countable teeth 0.74 mm with 48 teeth; from base to end of distinct area 0.62 mm with 41 teeth; area with distinctly spaced, including largest teeth 0.40 mm with 26 teeth ( Fig. 4G ). Tenth abdominal tergite wider than long, anterior margin concave, hind margin wide-roundly excised in middle, obtuse angularly projecting on both sides of excision ( Fig. 2G ). Cerci in about basal third straight cylindrical, afterward compressed with concave internal surface that is roundly projecting ventrad, dorsal margin in that area little swollen; apical area curved mediad and strongly narrowed, rounded or faintly compressed, little curved ventrad and carrying at obtuse end a minute spinule; at curvature of cercus provided with a stout but short cone ( Figs 2G–H ). Subgenital plate triangularly excised from base, ventral disc with converging margins that are curved dorsad and then laterad forming compressed lateral expansions with little wavy margin; central disc in apical area with lateral margins extended into long, rounded projections that carry at end minute styli. Titillators long and narrow; basal area hyaline, expanded apico-laterad; central area narrow parallel-sided, curved toward apical area and becoming moderately widened, at end provided with a sclerotized disc twisted against main titillator axis; surface of titillators largely hyaline, in widened area with light brown striation and scattered small brownish spots ( Figs 5J–K ). Female. Subgenital plate at very base narrowed, afterward with rather stout lateral projections bent dorsad and with obtuse dorsal end; behind those projections, central disc bent little ventrad and then strongly dorsad into a pair of narrow apical projections that are dorso-ventrally compressed and slightly wavy, tip sub-truncate ( Figs 7F–H ). Coloration. As other species of the genus. Scapus brown, lateral area green. Fastigium verticis and a band behind eyes medium brown. Dorsal area of tegmen of light color. Hind knees blackish brown. Female subgenital plate mostly blackish brown. Measurements ( 2 males , 3 females ).—Body w/wings: male 28, female 27–28; body w/o wings: male 22–23, female 21–24; pronotum: male 8.0–8.5, female 6.5–7.5; tegmen: male 18.0–18.5, female 20–21; hind femur: male 14.5–17.0, female 15.0–16.5; ovipositor: female 10.0– 11.5 mm .