Homogryllacris biloba (Bey-Bienko, 1957)

Zhang, Qianwen, Liu, Mingyu & Bian, Xun, 2023, Contribution to the knowledge of Chinese Gryllacrididae (Orthoptera) XVII: New reports on Chinese Homogryllacris, Zootaxa 5330 (2), pp. 295-300 : 295-297

Homogryllacris biloba (Bey-Bienko, 1957)

Ę叶ÑḆẽ

Figures 1–2

Description. Male (new description). Body medium. Face smooth with scattered impressed dots ( Fig. 1A ). Eyes oval. Ocelli distinct. Fastigium verticis about two times as wide as scape.

Pronotum projected slightly in median area of anterior margin, posterior margin faintly concave; lateral lobes longer than high, ventral margin almost straight, humeral sinus indistinct ( Fig. 1B–C ).

Fore coxae with 1 spine. Fore and middle femora unarmed on ventral surfaces, hind femora with 1–2 internal and 4 external spines on ventral surface. Fore and middle tibiae with 5 pairs of ventral spines, including 1 pair of apical ones; middle tibiae with 1 internal spine on dorsal surface; hind tibiae cylindrical with 4 internal and 4–5 external spines on dorsal surface, apices with 1 pair of dorsal spurs (the internal spur slightly longer than external one), 1 pair of subapical ventral spurs and 2 pairs of ventral spurs.

Wings small, positioned laterad, only reaching the middle area of mesonotum ( Fig. 1C ); hind wings absent. Ninth abdominal tergite prolonged, and curved ventrad, posterior margin arched with 1 median concavity ( Fig. 1F ). Tenth abdominal tergite with 1 pair of processes, suited on the concavity of ninth abdominal tergite; basal area of the processes depressed, crossed on each other, apical four-fifths area curved ventrad and slightly incurved, hook-shaped in apical view, apical area strongly sclerotised, apices acute. Cerci conical, directing dorsad and inwards ( Fig. 1G ). Subgenital plate broader than long, basal margin semi-membranous, posterior margin with an obtusely triangular concavity, the lateral lobes obtuse ( Fig. 1H ); styli inserted at apico-lateral angles of subgenital plate ( Fig. 1H ).

Coloration. Body yellowish brown. Internal margin of antennal socket black, ventral margin with 1 longitudinal black stripe on each side, basal areas and apical areas of scape black, pedicel with black spots, flagellum black ( Fig. 1A ). Fastigium verticis with 1 pair of black spots ( Fig. 1A ). Dorsal surface of head with 1 pair of black spots at anterior area and 1 semicircular black stripe ( Fig. 1B ). Pronotum with black margins, disc with 1 longitudinal black band along the midline which widened at anterior and posterior margins ( Fig. 1B ). Mesonotum and metanotum with widely longitudinal black stripe along the midline, which widened at posterior margin ( Figs. 1B , 2B ). Fore coxae with black spine. Apical areas of all femora and tibiae brown. Tegmina black. Abdominal tergites black, sternites with blackish spots in middle area.

Measurements (mm). Male: BL 16.5, PL 3.6, TL 0.8, HFL 8.7.

Material examined. 1 male, Cangshan, Dali , Yunnan, alt. 1999m, July 21, 2008, coll. by Jianmei Wang ; 1 female, Xiaguan, Dali , Yunnan, June 20, 2023, coll. by Shihua Peng .

Distribution. Yunnan (Dali).

Figures

FIGURE 1. Homogryllacris biloba (Bey-Bienko, 1957). Male: A. head in frontal view; B–C. head and pronotum: B. dorsal view, C. lateral view; D. tegmen in lateral view; E–G. apex of abdomen: E. dorsal view, F. lateral view, G. apical view; H. subgenital plate in ventral view.

FIGURE 2. Homogryllacris biloba (Bey-Bienko, 1957). Female: A. head in frontal view; B–C. head and pronotum: B. dorsal view, C. lateral view; D. tegmen in lateral view; E. middle tibia in dorsal view; F. apex of abdomen in dorsal view; G. second and third abdominal tergites in lateral view; H. apex of abdomen in ventral view; I. apex of abdomen in lateral view; J. apices of ovipositor in lateral view.