Pyrrhalta ohbayashii Kimoto, 1984 Figs 48D, 49A-C, 50

Pyrrhalta ohbayashii Kimoto, 1984: 46; Kimoto 1987: 188 (additional records); Kimoto 1991: 9 (additional records); Kimoto and Chu 1996: 57 (catalogue); Kimoto and Takizawa 1997: 300 (key), 373; Beenen,2010: 453 (catalogue); Xue and Yang 2010: 127 (catalogue); Yang et al. 2015: 119 (catalogue).

Types.

Holotype ♀ (KUEC, by original designation): "(FORMOSA) / Mt. Lala-shan [拉拉山] / Taoyuan Hsien / 7, V 1982 / N. Ohbayashi leg. [p, w] // Pyrrhalta / Pyrrhalta ohbayashii / Kimoto, n. sp. [h, w] // HOLOTYPE [p, r] // KU. Type / No. 2438 [p, w]". Paratype. 1♀ (KMNH): "(FORMOSA) / Mt. Lala-shan [拉拉山] / Taoyuan Hsien / 7, V 1982 / N. Ohbayashi leg. [p, w] // Pyrrhalta / Pyrrhalta ohbayashii / Kimoto, n. sp. [h, w] // PARATOPOTYPE [p, b]".

Other material.

Taiwan. Kaohsiung: 1♀ (KMNH), Tayuenshan, near Liukui (六龜), 5.VI.1989, leg. K. Baba, det. S. Kimoto , 1990; 1♂ (TARI), Tengchih (藤枝), 10.VIII.2013, leg. W.-C. Liao ; 1♂ (TARI), same locality, 8.V.2020, leg. Y.-C. Hsu; 1♀ (TARI), Tona trail (多納林道), 5.XI.2016, leg. W.-C. Liao ; Pingtung: 1♀ (TARI), Peitawushan (北大武山), 28.V.2014, leg. Y.-T. Chung ; 4♀ (TARI), same but with “1.IX.2016”; 1♂, 1♀ (TARI), same but with “30.IV.2017”; 2♀ (TARI), same but with “28.IX.2017”; 3♂, 1♀ (TARI), Shahsi trail (沙溪林道), 20.VII.2017, leg. B.-X. Guo ; 5♂, 7♀ (TARI), Taiwu (泰武), 11.IX.2020, leg. Y.-T. Chung ; Taipei: 3♂ (TARI), Yingzuling (鶯子嶺), 24.VII.2010, leg. Y.-L. Lin.

Redescription.

Length 4.5-4.6 mm, width 1.9-2.1 mm. Body color (Fig. 49A-C) dark brown; antennae black except three basal antennomeres. Eyes large, interocular space 1.77-1.91 × diameter of eye. Antennae filiform in males (Fig. 50A), gradually broadened from antennomere IV, broadest at VII and VIII, then gradually narrowed to apical antennomere, length ratios of antennomeres I-XI 1.0: 0.5: 0.8: 0.7: 0.7: 0.6: 0.6: 0.6: 0.6: 0.6: 0.7, length to width ratios of antennomeres I-XI 3.0: 2.2: 3.5: 3.0: 2.6: 2.0: 1.8: 1.9: 1.8: 1.7: 2.5; similar in females (Fig. 50B), length ratios of antennomeres I-XI 1.0: 0.5: 0.9: 0.7: 0.7: 0.7: 0.7: 0.6: 0.6: 0.6: 0.8, length to width ratios of antennomeres I-XI 3.3: 2.0: 3.5: 2.8: 2.4: 2.1: 2.0: 1.7: 1.9: 1.9: 2.6. Pronotum and elytra convex. Pronotum 1.8-1.9 × wider than long, disc with reticulate microsculpture; with extremely dense, coarse punctures, and short pubescence, with median longitudinal and lateral depressions; lateral margins slightly rounded, widest at middle, apical and basal margin slightly concave; anterior and posterior setiferous punctures slightly erect. Elytra elongate, parallel-sided, 1.7-1.8 × longer than wide; disc with reticulate microsculpture, with sparse, coarse punctures, and short pubescence. Apical spur of tibia of middle leg small (Fig. 50G), and tarsomere I of middle with narrow basal half and small acute process at basal 1/3 in lateral view in males (Fig. 50L). Aedeagus (Fig. 50C-E) broad in dorsal view, 4.2 × longer than wide, broadest at middle, symmetric, apex lanceolate; ostium transverse at apical 1/3, not covered by a membrane; strongly curved near base and at apical 1/5 in lateral view, apex narrowly rounded; two endophallic sclerites small and elongate, primary sclerite straight in lateral view, 0.3 × as long as aedeagus, secondary sclerite curved in lateral view, 0.7 × as long as primary sclerite. Gonocoxae (Fig. 50H) basally connected, short, with a number of long setae near apex. Ventrite VIII (Fig. 50F) with apical area well sclerotized, apical margin truncate but slightly concave at middle, with dense, long setae along apical area, spiculum extremely long. Receptacle of spermatheca (Fig. 50I) very swollen; pump long and strongly curved; sclerotized proximal spermathecal duct wide and short. Apical margin of abdominal ventrite V slightly concave medially and with deep depression in males (Fig. 50K); straight in females (Fig. 50J).

Remarks.

Adults of P. ohbayashii Kimoto (Fig. 49C) are similar to those of P. ishiharai Kimoto (Fig. 34A) and P. wulaiensis sp. nov. (Fig. 34D) in possessing longitudinal ridges on the brown elytra, but differ by the narrower elytra, 1.7-1.8 × longer than wide (elytra 1.5 × longer than wide in P. ishiharai and P. wulaiensis sp. nov.). Gonocoxae are similar to those species of Xanthogaleruca . In males of P. ohbayashii, the aedeagus is diagnostic; strongly curved at apical 1/3 and the extremely small endophallic sclerites.

Food plant.

Adults feed on leaves of Prunus phaeosticta var. phaeosticta (Hance) Maxim. (Fig. 48D).

Distribution.

The species is widespread at lowlands (0-1,500 m) in northern and southern Taiwan.