Tachycines (Tachycines) borealis (Cui et Liu, 2013)

Qin, Yanyan, Wang, Hanqiang, Liu, Xianwei & Li, Kai, 2018, Divided the genus Tachycines Adelung (Orthoptera, Rhaphidophoridae: Aemodogryllinae; Aemodogryllini) from China, Zootaxa 4374 (4), pp. 451-475 : 474

18. Tachycines (Tachycines) borealis (Cui et Liu, 2013)

( Figs. 56–60 )

Diestrammena (Tachycines) borealis Cui et Liu, 2013 . Insects of Helanshan Region of Inner Mongolia, 46–47 pp, figs.13.A–D.

Description. Male. Body small to medium sized. Vertex of head divided into conical tubercles. Legs elongate and slender; fore femora about 1.5 times as long as the pronotum, beneath unarmed, internal genicular lobe with a small spine, external genicular lobe with 1 elongate movable spur; fore tibiae ventrally with 2 external and 2 internal spurs. Mid femora with an elongate movable spur on the internal and genicular lobe, ventrally unarmed; mid tibia ventrally with 2 external and internal spurs. Hind femur ventrally with 1–3 inner spines and without outer spines; hind tibia dorsally with 48–52 outer and inner spines respectively, arranged in groups. Super internal spur of hind tibia not exceeding the dorso-apical spine of metatarsus ( Fig. 57 ). Hind metatarsus keeled beneath. Epiphallus of male genitalia trapezoidal and with denticles all round, the upper end concave and the ventral apex truncated ( Figs. 58–59 ).

Female. Subgenital plate triangular and the apex blunt ( Fig. 60 ). Ovipositor longer than the half hind femora.

Coloration. Body light brown with black or brown stripes. Face with 2 dark longitudinal stripes. Pronotum with 2 dark brown stripes ( Fig. 56 ).

Measurements. (length in mm) Body ♂ 15.0, ♀ 15.0; pronotum ♂ 6.0, ♀ 6.0; fore femora ♂ 9.5, ♀ 10.0; hind femora ♂ 18.0, ♀ 15.0; ovipositor 12.0.

Material examined. 2♂♂, Helanshan , Ningxia, 1982-VII, collected by Ren Guo-Dong et al. ; 1♂ 2♀♀, Shuimogou , Helanshan, Inner Mongolia, alt. 2350m, 2010-VI-30 ~ VIII-11, collected by Cui Feng-Li et Zhang Xufeng.

Distribution. China (Ningxia, Inner Mongolia).

Diagnosis. This species is rather similar to T. (T.) chinensis Storozhenko, 1990 but differs from the latter in that: fore femora without spines beneath; epiphallus of male genitalia trapezoidal and with denticles all round, the upper end concave and the lower end almost truncated.

Etymology. The specific epithet refers to the boreal district where this species occurs.

Figures

FIGURES 56–60. Tachycines (Tachycines) borealis (Cui et Liu, 2013). 56. Head, frontal view; 57. Hind tarsus, lateral view; 58. Male genitalia, dorsal view; 59. Male genitalia, ventral view; 60. Female genitalia, ventral view. (Scale bars: 1mm). (Copy from Cui et Liu, 2013).