Eugryllacris malaccensis ( Griffini, 1908b )

Ingrisch, Sigfrid, 2018, New taxa and records of Gryllacrididae (Orthoptera, Stenopelmatoidea) from South East Asia and New Guinea with a key to the genera, Zootaxa 4510 (1), pp. 1-278 : 39-40

Eugryllacris malaccensis ( Griffini, 1908b)

Figs. 4I , 5F , 6 J–K, 9E

Material examined. Malaysia: Selangor, Ulu Gombak Field Study Centre, 20 km NW Kuala Lumpur, (3°20'N, 101°45'E), 6.ii.1991, leg. D. Kovac— 1 male (Frankfurt SMF) .

Diagnosis. The species can be characterized by the male ninth abdominal tergite with the divided apical area being granular and the apical margin provided with a pair of small styliform horizontal projections ( Figs. 6 J–K).

Description. Large species ( Fig. 4I ). Head: Face ovoid; fastigium verticis about twice as wide as scapus; ocelli indistinct; fastigium frontis separated from fastigium verticis by a very fine suture; a pair of weak sub-antennal furrows, starting at internal angles of antennal scrobae, separate the central area of face from lateral areas and fuses ventrally with clypeo-frontal suture, clypeo-frontal suture interrupted in middle; subocular furrows present ( Fig. 5F ). Pronotum at lateral and anterior areas of rim with fine granules. Abdominal tergites two and three with a single row of 7 minute stridulatory pegs along hind margin of third tergite.

Wings reaching about tip of stretched hind tibiae. Tegmen ( Fig. 9E ): Radius with two branches, both forked near tip; media anterior fused in basal area with radius; media posterior absent; cubitus anterior forks before midlength into two veins, CuA1 and CuA2; cubitus posterior undivided, free throughout; with 5 anal veins.

Legs: Fore coxa with a rather large spine at fore margin; fore and mid femora unarmed; fore and mid tibiae with four pairs of large, on mid tibiae comparatively short, ventral spines and one pair of smaller ventral spurs; hind femur with 8 external and 7 internal spines on ventral margins; hind tibia with spaced spines on both dorsal margins, ventral margins with one pre-apical spine each; with 3 apical spurs on both sides.

Coloration. General color light brown (originally conserved in alcohol); vertex unicolored; disc of pronotum unicolored, hind margin hardly darker. Legs of general color. Face unicolored; only clypeo-frontal suture and lateral margin and tip of mandibles black. Tegmen semi-transparent whitish with hardly darker yellowish veins; hind wing anterior area as fore wing, otherwise medium to dark brown contrasting with cross-veins and surrounding areas light yellowish brown.

Male. Ninth abdominal tergite semi-globular: prolonged and down-curved laterally and apically; before apex furrowed and narrowly split in midline with resulting margins granular; apical margin with a fine styliform projection on both sides of split area projecting mediad. Tenth abdominal tergite narrow, band-shaped, interrupted in middle ( Figs. 6 J–K). Epiproct distinct. Subgenital plate almost twice as wide as long, shallowly and widely grooved in apical half; apical margin wide obtuse-triangularly excised; styli inserted laterally at apical margin ( Fig. 6K ). Phallus membranous.

Female see Karny (1923).

Measurements (1 male).—body w/wings: 50; body w/o wings: 35; pronotum: 8; tegmen: 37; tegmen width: 13; hind femur: 18 mm.

Figures

FIGURE 4. Genus Eugryllacris: Habitus dorsal view: A–B, E. trabicauda sp. nov. female holotype (A) and male paratype (B); C–D, E. vermicauda sp. nov. female holotype (C) male paratype (D); E, E. serricauda sp. nov. male holotype; F, E. guomashan sp. nov. female holotype; G, E. crassicauda sp. nov. female paratype; H, E. crassicauda cambodiana ssp. nov. female holotype; I, E. malaccensis (Griffini, 1908) male; J, E. serricauda sp. nov. female paratype. Scales 10 mm.

FIGURE 5. Genus Eugryllacris: A, E. gandaki sp. nov. female holotype; B, E. serricauda sp. nov. male holotype; C, E. crassicauda sp. nov. female paratype; D, E. crassicauda cambodiana sp. nov. female holotype; E, E. sulcata sp. nov. female holotype; F, E. malaccensis (Griffini, 1908) male; G, E. vermicauda sp. nov. female holotype; H, E. trabicauda sp. nov. female holotype; I, E. inversa sp. nov. male holotype; J, E. guomashan sp. nov. female holotype; K, E. sulcata sp. nov. female holotype.—Face (A–J), habitus dorsal view (K). Scales 5 mm (face); 10 mm (habitus).—Abbreviations: as antennal scrobus, cf clypeo-frontal suture, cl clypeus, e compound eye, ff fastigium frontis with median ocellus, fv fastigium verticis, la labrum, lo lateral ocellus, lp labial palpus, ma mandible, mo median ocellus, mp maxillary palpus, sa sub-antennal furrow, so subocular furrow, sc scapus. The arrow in H points at the spine at anterior coxa.

FIGURE 6. Genus Eugryllacris: A–B, E. trabicauda sp. nov. paratype; C–D, E. vermicauda sp. nov. paratype; E–F, E. serricauda sp. nov. holotype; G–I, E. panteli (Bolivar, 1900) male type; J–K, E. malaccensis (Griffini, 1908); L–M, E. inversa sp. nov. holotype.—Male abdominal apex in about ventral (A, C, H, K, L), apical (E, J, M), and oblique lateral view (G, on both specimens studied distorted), tip of ninth abdominal tergite with projections in higher magnification (B, D, F), subgenital plate ventral view (H) and dorsal view (I: process of subgenital plate terminates into a down curved acute tip; tip of process vertical to disc of plate). Scales 5 mm.

FIGURE 9. Genus Eugryllacris: A, E. inversa sp. nov. male holotype; B, E. maculipennis (Stål, 1877) det. Brunner female; C, E. maculipennis specularis (Karny, 1925) female type; D, E. gandaki sp. nov. female holotype; E, E. malaccensis (Griffini, 1908) male; F, E. crassicauda cambodiana ssp. nov. holotype; G, E. vermicauda sp. nov. holotype; H, E. inversa sp. nov. paratype; I, E. gandaki sp. nov.; J, E. sulcata sp. nov. holotype; K, E. crassicauda sp. nov. paratype; L, E. serricauda sp. nov. paratype; M, E. guomashan sp. nov. holotype; N, E. poultoniana (Griffini, 1909); O, E. trabicauda sp. nov. holotype.— Habitus in dorsal view (A–E) and lateral view (F), ovipositor (G–O). Scales 10 mm; images of ovipositor adapted to scale at bottom.