Neochya tsoui sp. nov. Figures 2D-F, 12

Types

(N = 49). Holotype ♂ (TARI), Taiwan. Chiayi: Laichitashan (來吉塔山), 19.III.2009, leg. H. Lee. Paratypes. 3♂♂, 4♀♀ (TARI), same data as holotype; Hsinchu: 1♂ (TARI), Lupi (魯壁), 3.II.2009, leg. H. Lee; 3♂♂, 3♀♀ (TARI), same locality, 10.III.2009, S.-F. Yu; 1♂, 1♀ (TARI), same locality, 18.IV.2009, leg. M.-H. Tsou; 1♂ (TARI), same locality, 12.VII.2009, leg. M.-H. Tsou; 3♂♂, 6♀♀ (TARI), same locality, 25.II.2010, leg. S.-F. Yu; Taipei: 1♂, 1♀ (TARI), same locality, 13.III.2011, leg. M.-H. Tsou; 3♂♂, 3♀♀ (TARI), same locality, 20.III.2011, leg. M.-H. Tsou; 1♀ (TARI), same but with "leg. S.-F. Yu"; Pingtung: 1♀ (TARI), Peitawushan (北大武山), 21.IX.2012, leg. J.-C. Chen; 1♀ (TARI), Tahanshan (大漢山), 22.II.2007, leg. S.-F. Yu; 1♀ (TARI), same locality, 19.VIII.2011, leg. J.-C. Chen; 4♀♀ (TARI), same locality, 2.IX.2011, leg. J.-C. Chen; 1♀ (TARI), same locality, 31.III.2012, leg. W.-C. Liao; 1♀ (TARI), same locality, 9.VI.2013, leg. Y.-T. Chung; Taipei: 1♂ (TARI), Fengkueitsui (風櫃嘴), 26.VII.2007, leg. M.-H. Tsou; 1♂ (TARI), Yangmingshan (陽明山), 10.III.2007, leg. M.-H. Tsou; Taitung: 1♀ (TARI), Tulanshan (都蘭山), 20.IX.2017, B.-X. Guo; Taoyuan: 1♂ (TARI), Lalashan (拉拉山), 14.V.2009, leg. C.-F. Lee.

Description.

Length 4.6-5.5 mm, width 2.1-3.0 mm. General color reddish brown or yellowish brown (Fig. 2D-F); but antennae, tibiae, and tarsi darker. Antennae (Fig. 12A) filiform in males, ratio of length of antennomeres I to XI 1.0: 0.4: 0.4: 1.0: 1.0: 1.0: 1.0: 1.0: 0.9: 0.8: 0.9; ratio of length to width from antennomere I to XI 3.6: 1.7: 1.8: 4.5: 5.1: 5.3: 5.3: 4.7: 4.5: 4.1: 4.4; a little slender in females, ratio of length of antennomeres I to XI (Fig. 12B) 1.0: 0.4: 0.4: 0.9: 1.0: 1.0: 1.0: 0.9: 0.9: 0.8: 0.9; ratio of length to width from antennomere I to XI 3.8: 2.0: 2.3: 4.5: 5.1: 5.8: 6.4: 6.1: 6.1: 5.6: 5.5. Pronotum 1.75-2.00 times wider than long; lateral margins rounded and basally narrowed, basal margin slightly rounded, apical margin slightly concave; disc with dense coarse punctures, with lateral depressions. Elytra 1.51-1.65 times longer than wide; lateral margins widest at apical 1/3; disc slightly convex, with dense, coarse punctures; apex rounded. Penis (Fig. 12C-E) wide, ca. 4.5 times longer than wide; lateral margins parallel from base to apical 2/5, then moderately broadened, widest at apical 1/5; apex broadly rounded; apical area weakly sclerotized; tectum elongate from apical 1/5 to middle, lateral margins slightly rounded and toothed, apex truncate; slightly curved in lateral view; ventral surface with membranous area from apex to apical 1/5; with one small rounded process inside lateral margin near apex. Endophallic spiculae complex with five or six pairs of hooked spiculae, with one pair of longitudinal rows of hair-like setae and small rounded sclerites near base. Gonocoxae (Fig. 12F) slender, tightly conjunct from apex to middle; each gonocoxa with eight setae from apical 1/6 to apex, subapically widened, apex truncate, base shallowly bifurcate. Ventrite VIII (Fig. 12G) weakly sclerotized except apex, with several long setae at apex, and several long setae at sides, short setae along apical margin, spiculum elongate. Spermathecal receptaculum (Fig. 12H) as slender as pump, apically tapering; pump slender and curved; sclerotized spermathecal duct extremely elongate, but base extremely wide, followed by slender tube, then with inflated areas. Bursal sclerites reduced.

Diagnosis.

Neochya tsoui sp. nov. is similar to N. hirashimai (Kimoto) in having slender elytra and lateral depressions on the pronotum (Figs 2D-F, 7) (wide elytra and lacking lateral depressions on the pronotum in others (Figs 4, 9), but differs from N. hirashimai in having reddish brown pronotum and elytra (reddish brown pronotum and yellowish brown elytra, or black pronotum, black basal half and yellowish brown apical half of elytra in N. hirashimai). In addition, males of both species are separated from others with serrate margin of tectum of the penis (Figs 8C, 12C) (smooth margin of tectum (Figs 5C, 10C), but males of N. tsoui differs from those of N. hirashimai with the penis widest at apical 2/5 (Fig. 12C, E) (penis widest at middle in N. nitidissima (Fig. 8C, E).

Food plants.

Celastraceae: Euonymus japonicus Thunb., E. spraguei Hayata (Fig. 1E, F).

Etymology.

This new species is dedicated to Mei-Hua Tsou, a member of TCRT and the first to collect this new species.

Distribution.

Widespread but scattered in Taiwan (Fig. 11B).