[21] Parena (Bothynoptera) emarginata sp. nov.

Habitus: Figs 46A, 46B. Gonocoxites of ovipositor: Fig. 11I.

Type locality. Sichuan, Muli County, Liziping xiang, N28.110, E101.138, 3059 m .

Type material. Holotype (IZAS, Fig. 46A): female, body length = 6.7 mm, board mounted, " China Sichuan Muli county, / Liziping xiang, river bank with / sparse tree / N28.11032 E101.13768 ", "2012,V,6. D 3059 m / Huang Hao leg / Inst. of Zoology, CAS", "HOLOTYPE / Parena (Bothynoptera) / emarginata sp. nov. / des. Shi H.L. 2022" [red label] <Figs 11I, 46C, 46D >. Paratype (IZAS): 1 female, " Xizang, Cona county, Lai xiang / 2500 m, Yang Xiaodong leg. / 2013.VI.20 " [in Chinese], "IOZ(E)1700238", "PARATYPE / Parena (Bothynoptera) / emarginata sp. nov. / des. Shi H.L. 2022" [red label] <Fig. 46B >.

Diagnostic characters. Dorsum pale yellow, pronotum with a pair of dark stripes, elytra with a pair of short basal stripes and a pair of well separate subapical spots; labrum slightly dilated to apex, apex strongly emarginate; antennae extended only slightly beyond elytral base; elytra intervals with very sparse fine punctures.

Comparisons. The new species is different from all other species of the genus Parena by the apex of labrum strongly emarginate (Fig. 46C). Several other species of the P. tripunctata group have the labrum apex very weakly emarginate, but the labrum apex is straight or slightly curved in all other species groups of the genus. The elytral color pattern of the new species is similar to some individuals of P. taiwana with four spots. However, the new species can be easily distinguished from P. taiwana by: labrum apex emarginate; pronotum with a pair of dark stripes; elytral intervals without dense punctures; and antennae shorter, extended beyond the elytra base by the length of only one antennomere.

Description. Body length 6.3–6.7 mm; body relatively narrow for the genus; dorsum without microsculpture.

Color. Dorsum mostly pale yellow to light brown; head yellowish brown, vertex with indistinct dark brown patch, mouthparts and antennae yellow, apices of mandibles dark. Pronotum disc with a pair of dark stripes aside median line, not extended to anterior or posterior margins. Elytra with four black patches: a pair of short stripes slightly distant from elytra base, about one-fifth as long as elytra, extending from outer half of interval 4 to inner half interval 6; another pair of round spots near apical third of elytra, extending from outer half of interval 3 to inner half of interval 5. Scutellum, epipleura, legs and venter yellow. Head with sporadic fine punctures on vertex and occiput; eyes large and strongly prominent; tempora short, abruptly narrowed behind eyes, length of tempora plus neck-constriction approximately one-third of diameter of eye; postgenae with a pair of suborbital setae, as long as supraorbital setae. Antennae extended beyond elytral base by length of only one antennomere. Labrum slightly dilated to apex, apex strongly emarginate; mandibles short and wide; mentum with a pair of long median setae, lateral lobes short, apex narrow, inner margins strongly oblique, outer margins rounded, epilobes rather wide. Pronotum nearly rectangular, PW/PL = 1.35–1.37, about same width as head, PW/HW = 1.00–1.03, widest at anterior third, lateral explanations slightly wide; lateral margins fully rounded at anterior half and then narrowed to base with distinct sinuation before posterior angles; posterior angles weakly pointed outwards, forming rectangular angles with rounded apex; anterior margin nearly straight at middle; posterior margin oblique at sides; disc convex, with very fine transverse wrinkles. Elytra weakly convex, slightly dilated to apex. Striae very shallowly incised at basal half, almost flat at apical half, with rows of fine punctures on basal five-sixth, punctures absent from apical sixth; intervals weakly convex, with very sparse fine punctures. Disc without depression, lateral sides slightly depressed near anterior third. Elytral basal pore present at base of stria 1; interval 3 with three discal setigerous pores: first one on a level much behind scutellar apex, adjacent to stria 3; second one slightly before middle, adjacent to stria 3; third one on apical eighth, adjacent to stria 2; interval 9 with 23–24 umbilicular pores. Apical truncation indistinct, evenly rounded, sutural angles indistinct. Venter. In females, apex of abdominal sternite VII straight, with two setae on each side. Female genitalia. Gonocoxite II of ovipositor rounded rectangle, basal width much greater than length, apex straight, with five or six very short ensiform setae nearly evenly arranged. Male unknown.

Distribution (Map 8, dark green). China (Sichuan, Xizang). Only known from two specimens from well separated localities.

Etymology. The scientific name of the new species " emarginata " is derived from Latin referring to its labrum apex strongly emarginate, which is the unique character of this species.

Remarks. The holotype was collected in a sparse riparian forest, about six meters high in the canopy, using a long-stick sweep net.