Bolivaritettix humeralis Günther, 1939

Storozhenko, Sergey Yu., 2018, Pygmy grasshoppers (Orthoptera: Tetrigidae) of Vietnam: the genus Bolivaritettix Günther, 1939, Zootaxa 4374 (4), pp. 497-523 : 506-508

Bolivaritettix humeralis Günther, 1939

Figs 8 , 29–31

Bolivaritettix humeralis Günther, 1939: 84 , figs 50, 51 (holotype—male, China: Guangdong [Guangzhou = Canton], Wa Sehan Tai; in Museum für Naturkunde, Berlin).

Bolivaritettix humeralis: Blackith, 1992: 9 ; Otte, 1997: 39; Liang & Zheng, 1998: 124, fig. 85; Zheng, 2005: 209, figs. 430, 431; Deng et al., 2009: 285; Deng et al., 2010: 49.

Material examined. Vietnam: Vinh Phuc Province, Tam Dao National Park , 12–13 May 1975, 1 female, coll . L.N. Medvedev; the same locality, 1–5 June 1995, 1 male, coll. A.V. Gorochov ; Lao Cai Province, Sa Pa District, Fan Si Pan Mt. , 22o18’56’’ N, 103o49’35’’ E, 1400–1500 m, 26 May –6 June 1999, 1 female, coll . N.L. Orlov. (Altogether 2 females and 1 male).

Description. Female. Body large-sized for this genus. Antennae filiform, 16-segmented, 1.7–1.9 times as long as fore femur; middle segments (seventh–ninth) 6.4–7.4 times as long as wide. Antennal grooves situated between lower margins of eyes. Fastigium of vertex 1.5 times as wide as one compound eye seen from above; anterior margin of vertex almost straight, reaching the frontal line of eyes; lateral margins of vertex not curved; median carina of fastigium distinct; transverse carinae reaching anteriorly the median carina; supraocular lobes distinct; fossulae deep. Compound eyes not elevated above pronotum in lateral view. Lateral ocelli situated between middle of eyes. Frontal ridge in lateral view gentle excised between lateral ocelli, broadly rounded between eyes and distinctly excised below median ocellus; in frontal view, this ridge gently diverging downwards and narrow (ridge near the base of antennae as wide as first antennal segment). Pronotum in dorsal view with straight anterior margin; posterior process of pronotum long, surpassed apex of hind femora by 4–5 mm. Disc of pronotum behind the shoulders with a pair of shallow depressions; posterior process of pronotum with a few tubercles; apex of this process rounded. Lateral sides of shoulders obtuse angular in dorsal view. Median carina of pronotum in profile gently raised before shoulders and low along the posterior process. Prozonal carinae well defined, constricted backwards; prozona almost as long as wide. Humero-apical carinae distinct; interhumeral carinae vestigial. Tegminal sinus deep; lower part of lateral lobe of pronotum in dorsal view forming triangle lobule. Infrascapular area short. Tegmina broad with rounded apex; visible part of tegmen 2.2–2.4 times as long as wide; this part of tegmen 1.3 times as wide as mid femur. Hind wings reaching the apex of posterior process of pronotum. Fore femur 4 times, mid femur 4.5–4.6 times as long as wide; upper and lower side of fore and mid femora sinuate. Hind femur 3.5 times as long as wide. Upper side of hind tibia with 6 outer and 5–6 inner spines, with margins finely serrated. First tarsal segment of hind leg as long as third one; ventral side of first tarsal segment with three triangular pads, apical pad slightly longer than other pads; third tarsal segment not swollen. Epiproct triangular, with pointed apex. Subgenital plate 1.4–1.5 times as long as wide; posterior margin of plate excised and with angular posterior process near middle. Cerci conical, with rounded apices, 2.1–2.3 times as long as wide near cercal base. Valves of ovipositor narrow, dentate; length of upper valve 4.3–4.7 times as great as its maximum width; length of lower valve 6–6.1 times as great as its maximum width.

General colouration of body brown. Head brown; eyes dark brown; antennae light brown with blackish apex. Disc of pronotum and lateral lobes brown. Tegmina brown, hind wings blackish. Fore and mid femora dark brown. Fore and mid tibia brown. Hind femora brown with indistinct blackish marks; the ventral external area dark brown. Hind tibiae brown. All tarsal segments light brown. Tergites brown with blackish longitudinal stripes. Sternites brown, epiproct and cerci brown. Subgenital plate and ovipositor light brown.

Male. General appearance similar to that of female. Antennae 16-segmented; 1.6 times as long as fore femur; middle segments 6.4–6.5 times as long as wide. Fastigium of vertex 1.5 times as wide as one compound eye seen from above; carinae of vertex as in female. First antennal segment as wide as ridge near the base of antennae. Pronotum as in female. Tegmina broad with rounded apex; visible part of tegmen 2.3 times as long as wide; this part of tegmen 1.2 times as wide as mid femur. Hind wings reaching the apex of posterior process of pronotum. Legs as in female; hind femur 3.6 times as long as wide; upper side of hind tibia with 5 outer and 4 inner spines. Epiproct triangular, with pointed apex. Subgenital plate 1.7 times as long as wide; its apex excised. Cerci as in female.

General colouration of body as in female. Epiproct, subgenital plate and cerci brown.

Measurements (mm). Body: male 10.7, female 11.4–12.2; pronotum: male 15.6, female 16.5–16.8; antenna: male 4.2, female 4.5; tegmen male 1.7, female 1.8–1.9; fore femur: male 2.6, female 2.6; mid femur: male 2.6, female 2.7–2.8; hind femur: male 7.3, female 7.7; ovipositor 1.8–1.9.

Distribution. China (provinces Guangdong and Guangxi), Vietnam (provinces Vinh Phuc and Lao Cai).

Remarks. This species is easily recognizable from all congeners by distinctly widened between shoulders disc of the pronotum and by obtuse angular lateral sides of the shoulders ( Deng et al., 2010). Here, this species is recorded from Vietnam for the first time.

Figures

FIGURES 5–13. Bolivaritettix, head and anterior part of pronotum, dorsal view. 5, B. sculptus, female; 6, B. vietnamensis. sp. nov., female; 7, B. chinensis, female; 8, B. humeralis, female; 9, B. anaglypticus sp. nov., female; 10, B. constrictus sp. nov., male; 11, B. abruptus sp. nov., female; 12, B. celaenotus, female; 13, B. similis sp. nov., female Scale bars 1 mm.

FIGURES 29–31. Bolivaritettix humeralis, male. 29, body, lateral view; 30, the same, dorsal view; 31, head, frontal view.