Nisitrus brunnerianus

Figs 5, 7 A, 8 A – B, 10 A, 11 A, 12 A, 13 A, 14 A, 15 B, 16 A, 17 A – B, 18; Tables 1 – 3

Sumber: Revision of the cricket genus Nisitrus Saussure (Orthoptera: Gryllidae: Eneopterinae) and descriptions of five new species

Redescription Relatively large and slender (Figs 7 A, 18). Vertex completely black (Fig. 11 A). Fastigium velvety black, with anterior margins yellow. Scapes black, posterior end red brown. Antennae red brown with some segments black and with wide whitish rings. Eyes dark green when alive and red brown when dried. Frons generally black, sometimes with yellow to cream-coloured bands above and beneath antennal cavity and along ventral margins of eyes (Fig. 10 A). Mouthparts dark red brown to black. Maxillary palpi creamcoloured; apical segment black apically (Fig. 10 A). Head lateral side black (Fig. 12 A). Pronotum generally black, covered with white setae; dorsal disk trapezoidal, posterior margin bisinuated (Fig. 11 A). Lateral lobes of pronotum with two variants: (1) in lectotype, completely black except for a cream-coloured oblong spot near anterior margin (Fig. 12 A); (2) dorsal third black, otherwise completely yellow. Legs red brown. FIIIs dark red brown, sometimes with a dorsal black longitudinal stripe; knees dark brown to black; TIIIs brown with black spines and spurs, dark brown to black near distal end; tarsomeres dark brown to black. Hindwings hyaline brown, with a rounded transparent window near internal-basal area; longer than FWs, the dark brown tail exceeding FWs more than twice as long as pronotum. Tergites black, in some segments with cream-coloured transverse stripe at anterior end and / or with pale band laterally; sternites pale, their median area red brown. Cerci cream-coloured, short and conical. Male FOREWINGS. FW colouration (Fig. 13 A): dorsal field cells mostly transparent to pale yellow, veins mostly dark brown to black. Basal area brown with tint of black. R brown, Sc projections brown basally, transparent apically. Lateral field yellow brown, apex more transparent. FW venation (Fig. 13 A): 1 A somewhat straight. Harp slightly longer than wide, with 3 oblique veins, posterior-most vein bifurcated at base. c 1 long and wide, c 2 diamond-shaped; mirror (d 1) longer than wide, not rounded, generally separated into two parts by a distinct, roundly bent transverse vein, the posterior part hexagonal, shorter than anterior part. Cell d 2 narrower than d 1. Apical field short and rounded, with 2 wide cell alignments posterior to mirror and a narrow apical alignment; veins yellow. Lateral field with 5 – 6 projections of Sc. Epiproct black. Subgenital plate pale cream, its median area and anterior and posterior margins black. GENITALIA (Fig. 16 A). Pseudepiphallus sclerotized, relatively large and broad compared to congeners, anterior margin somewhat broad and straight, posterior margin also straight, lateral margins faintly converging posteriorly. Posterior apex with paired lophi longer than wide (at base), subacute at apex, sclerotized laterally only and covered with strong short setae; spaced apart from one another. Rami swollen preapically, anterior apex somewhat truncated. Pseudepiphallic parameres narrow, divergent posteriorly, their basis membranous, with a sclerotized lobe on anterior apex. Ectophallic arc transverse, complete, with anterior and posterior margins straight. Ectophallic fold strong rounded lateral sclerites appearing bean-shaped. Ectophallic apodemes long and thin, straight and slightly divergent basally. Endophallic sclerite large and sclerotized, its posterior apex with divergent lateral arms and with a short median expansion curved dorsally. Endophallic apodeme with lateral lamellae stout. Female FOREWINGS. FW colouration (Fig. 14 A): cells on dorsal field mostly infumated black, gradually becoming yellow near CuA, M and R veins; veins generally black or dark brown, also gradually becoming yellow towards CuA, M and R veins; veins near apical area also yellow. Sc projections cream-coloured basally, black apically. Lateral field dark. FW venation: 6 – 7 strong longitudinal veins on dorsal field, sometimes not smooth; lateral field with 6 projections of Sc. GENITALIA. Ovipositor: on average longer than FIII; apex thin with both dorsal and ventral edges smooth. Copulatory papilla conical, slender, more elongated than congeners; apex folded ventrally, long and slender, pointed; dorsal face with a sclerotized area; ventro-anterior end forming a somewhat triangular rim (Fig. 17 A – B). Juvenile Unknown. Measurements See Table 3.