Pyrrhalta meifena Kimoto, 1976 Figs 15D-F, 20, 21

Pyrrhalta meifena Kimoto, 1976: 4; Kimoto 1987: 188 (additional records); Kimoto and Chu 1996: 56 (catalogue); Kimoto and Takizawa 1997: 3010 (key), 373; Beenen 2010: 453 (catalogue); Xue and Yang 2010: 126 (catalogue); Lee and Cheng 2010: 119 (redescription); Takahashi 2012: 323 (deposition of type material); Yang et al. 2015: 119 (catalogue).

Types.

Holotype ♂ (OMNH, by original designation): "[TAIWAN] / Meifeng [梅峰] / Nantou Hsien [h, w] // 26.VI.1971/ Y. Miyatake [h, w] // Pyrrhalta / Pyrrhalta meifena / Kimoto, n. sp. [h, w] // HOLOTYPE [p, r] // (Regd. O.M.N.H.) [p, w]". Paratypes. 1 ♀ (KMNH): "(Taiwan) / Wushe [霧社] / Nantou Hsien [h, w] // 30.V.1965 / B. S. Chang [h, w] // Pyrrhalta / Pyrrhalta meifena / Kimoto, n. sp. [h, w] // Det. S. Kimoto, 19 [p, w] // PARATOPOTYPE [p, b]"; 1 ♂ (KMNH): "[TAIWAN] / Meifeng [梅峰] / Nantou Hsien [h, w] // 26.VI.1971 / Y. Miyatake [h, w] // Pyrrhalta / Pyrrhalta meifena / Kimoto, n. sp. [h, w] // PARATOPOTYPE [p, b]".

Other material.

Taiwan. Chiayi: 1♂, 2♀ (TARI), Alishan (阿里山), 22.IX.2009, leg. M.-H. Tsou ; 2♂♂ (TARI), same locality, 29.V.2016, leg. Y.-T. Chung; 1♂ (TARI), Shizilu (十字路), 23.VII.2015, leg. U. Ong ; Hsinchu: 9♂, 2♀, Litungshan (李棟山), 24-25.III.2009, leg. M.-H. Tsou ; 4♂, 3♀ (TARI), same locality, 28.III.2009, leg. S.-F. Yu; 1♀ (TARI), same locality, 16.VI.2010, leg. Y.-L. Lin; Hualien: 1♂, 2♀ (TARI), Kuanyuan (關原), 2.VII.2008, leg. S.-F. Yu and M.-H. Tsou ; 1♀ (TARI), Pilu (碧綠), 15.VII.2019, leg. B.-X. Guo ; 1♀ (TARI), Tayuling (大禹嶺), 2.VII.2018, leg. J.-C. Chen ; Kaohsiung: 1♀ (TARI), Chungchihkung (中之關), 1.VII.2009, leg. S.-F. Yu ; 1♀ (TARI), same locality, 2.VII.2009, leg. M.-H. Tsou; 1♀ (TARI), same locality, 17.IV.2012, leg. L.-P. Hsu; 1♂, 1♀ (TARI), Tienchih (天池), 2.VII.2009, leg. M.-H. Tsou ; Nantou: 1♂, 2♀ (TARI), Meifeng (梅峰), 24-26.VI.1981, leg. K. S. Lin & W. S. Tang ; 1♀ (TARI), same locality, 1-3.VIII.1981, leg. T. Lin & W. S. Tang; 6♂ (TARI), Tatachia (塔塔加), 13.VII.2014, leg. W.-C. Liao ; 1♂ (TARI), Tsuifeng (翠峰), 25-27.VI.1981, leg. K. S. Lin & W. S. Tang ; 1♀ (TARI), same locality, S. C. Lin & C. N. Lin; Taichung: 5♂, 7♀ (TARI), Anmashan (鞍馬山), 7.VI.2010, leg. C.-F. Lee ; Taitung: 1♂ (TARI), Hsiangyang (向陽), 9.V.2013, leg. J.-C. Chen ; 1♂ (TARI), same locality, 18.VII.2014, leg. W.-C. Huan; 2♀ (TARI), Liyuan (栗園), 19.VI.2013, leg. C.-F. Lee.

Redescription.

Length 5.6-6.5 mm, width 2.7-3.2 mm. Body yellow (Fig. 15D-F); antennae black but four or five basal antennomeres paled; tibiae and tarsi black or blackish brown. Eyes small, interocular space 2.35-3.58x diameter of eye. Antennae filiform in males (Fig. 20A), gradually broadened from antennomere V to X, length ratios of antennomeres I-XI 1.0: 0.7: 0.7: 0.8: 0.8: 0.8: 0.8: 0.7: 0.7: 0.7: 0.8, length to width ratios of antennomeres I-XI 2.8: 2.2: 2.3: 2.5: 2.6: 2.7: 2.6: 2.4: 2.3: 2.1: 2.7; similar in females (Fig. 20B), length ratios of antennomeres I-XI 1.0: 0.7: 0.8: 0.7: 0.9: 0.7: 0.7: 0.6: 0.6: 0.6: 0.8, length to width ratios of antennomeres I-XI 2.7: 2.5: 2.8: 2.7: 2.8: 2.3: 2.1: 1.8: 1.8: 1.9: 2.3. Pronotum and elytra convex. Pronotum 2.2-2.3 × wider than long, disc smooth; with extremely dense, coarse punctures, and sparse long pubescence, with median longitudinal and lateral depressions; lateral margins moderately rounded, widest at middle, apical and basal margins slightly concave; anterior and posterior setiferous punctures slightly erect. Elytra broad, parallel-sided, 1.5-1.6 × longer than wide; disc smooth, with extremely dense, coarse punctures, and short pubescence. Apical spur of tibia of middle leg absent and tarsomere I not modified in males. Aedeagus (Fig. 20C, D) broad in dorsal view, 5.7 × longer than wide, symmetric, subparallel from base to middle, then apically narrowed, apex acute; ostium obliquely longitudinal, covered by a membrane; strongly curved near base in lateral view, slight recurved at apical 1/6, apex acute; primary endophallic sclerites elongate, 0.5 × as long as aedeagus, with several teeth at apex. Only apices of gonocoxae (Fig. 20I) sclerotized, longitudinal, with dense, long setae along lateral and apical margins. Ventrite VIII (Fig. 20E) well sclerotized, with dense, long setae laterally, apical area, and along apical margin, spiculum long. Receptacle of spermatheca (Fig. 20F) very swollen; pump long and strongly curved; sclerotized proximal spermathecal duct narrow and short. Apical margin of abdominal ventrite V with one pair of rounded ridges at middle and slightly concave between ridges in males (Fig. 20H); broadly rounded in females (Fig. 20G).

Remarks.

adults of P. meifena Kimoto are characterized by their small body sizes, 5.6-6.5 mm long (7.3-8.7 mm long in others), and yellow bodies (Fig. 15D-F) (black bodies in P. alishanensis sp. nov. (Fig. 15A-C); brown bodies in P. igai and P. meihuai sp. nov. (Fig. 18)) within the species group. In males of P. meifena, the lanceolate aedeagus (Fig. 20C) is similar to those of P. alishanensis sp. nov. (Fig. 16C) and P. meihuai sp. nov. (Fig. 22C) but differs in lacking secondary endophallic sclerite in addition to the primary endophallic sclerite (one secondary sclerite in P. meihuai sp. nov.; two secondary sclerites in P. alishanensis sp. nov.).

Host plants.

Larvae and adults feed on leaves of Acer insulare Hayata var. caudatifolium (Hayata) and A. rubescens Hayata ( Sapindaceae).

Biology.

Mrs Su-Fang Yu found young larvae (Fig. 21B) feeding on tender leaves of Acer insulare var. caudatifolium (Fig. 21A) February 26, 2009, in Litungshan, northern Taiwan; and reared them in the laboratory. mature larvae (Fig. 20C) began to burrow into soil March 2, and built underground chambers for pupation. Duration of the pupal stage was 22-24 days. adults (Fig. 21D) appeared from spring to summer.

Distribution.

The species is widespread at mid-altitudes (1,500-2,500 m) in Taiwan.