Pyrrhalta kobayashii Kimoto, 1974 Figs 45A-C, 46

Pyrrhalta kobayashii Kimoto, 1974: 25; Kimoto and Chu 1996: 56 (catalogue); Kimoto and Takizawa 1997: 301 (key), 373; Beenen 2010: 453 (catalogue); Xue and Yang 2010: 124 (catalogue); Yang et al. 2015: 117 (catalogue).

Types.

Holotype ♀ (OMNH): "Mt. ALI / FORMOSA / 22.VII.1970 / T. KOBAYASHI [p, y] // Pyrrhalta / Pyrrhalta kobayashii / Kimoto [h, w] // HOLOTYPE [p, r]. Paratype. 1♀ (KMNH): "(TAIWAN) / Alishan (阿里山) / Chiai Hsien [p] / 29[h]. VII. 1966 / H. Kamiya leg. [p, w] // Pyrrhalta / Pyrrhalta kobayashii / Kimoto [h, w] // PARATYPE [p, b]".

Other material.

Taiwan. Nantou: 1♀ (TARI), Huakang (華岡), 20.VII.2017, leg. J.-C. Chen; Taichung: 1♀ (TARI), Pilu (畢祿), 2.VII.2008, leg. M.-H. Tsou; Taitung: 1♀ (TARI), Hsiangyang (向陽), 12.VII.2012, leg. J.-C. Chen.

Redescription

(females). Length 6.2-6.3 mm, width 3.2 mm. Body yellow (Fig. 45A-C); but antennae, lateral margins of elytra (sutures, basal and lateral margins), tibiae, and tarsi black; apices of femora darker. Eyes small, interocular space 2.05-2.09 × diameter of eye. Antennae filiform (Fig. 46A), length ratios of antennomeres I-XI 1.0: 0.5: 0.9: 0.8: 0.8: 0.8: 0.8: 0.8: 0.7: 0.7: 1.0, length to width ratios of antennomeres I-XI 3.2: 2.2: 3.6: 3.3: 3.2: 3.0: 2.9: 2.8: 2.5: 2.9: 4.1. Pronotum and elytra convex. Pronotum 1.8-2.0 × wider than long, with transverse ridge along apical margin deflexed at antero-lateral angles; disc smooth, with coarse punctures laterally, smaller medially; with dense short pubescence, but reduced above ridge, with median longitudinal and lateral depressions; lateral margins moderately rounded, widest at middle, apical and basal margins slightly concave; anterior and posterior setiferous punctures not erect. Elytra broad, parallel-sided, 1.5-1.6 × longer than wide; disc smooth, with dense, fine punctures, and dense, short pubescence, one pubescent seta in each puncture. Gonocoxae (Fig. 46D) apically sclerotized, small, broadly rounded, disc and apical margin with short dense setae. Ventrite VIII (Fig. 46B) transverse, with apical margin depressed at middle, a number of long setae near apical margin, spiculum long. Receptacle of spermatheca (Fig. 46C) slightly swollen and elongate; pump short and strongly curved; sclerotized proximal spermathecal duct narrow and short. Apical margin of abdominal ventrite V moderately concave medially (Fig. 46E).

Remarks.

The color pattern of adults of P. kobayashii (Fig. 45A) is similar to that of the typical form of P. discalis Gressitt & Kimoto (Fig. 31A). The species differs by the more slender antennae, antennomeres IV-X 2.8-3.6 × longer than wide (Fig. 46A) (antennomeres IV-X 1.7-2.4 × longer than wide in P. discalis (Fig. 32B)) and relatively narrow elytra, 1.6 × longer than wide (elytra 1.4 × longer than wide in P. discalis).

Food plant.

Unknown.

Distribution.

The species occurs at scattered localities at mid-altitudes (1,500-2,500 m) in central and southern Taiwan.