Pyrrhalta meifena species group

Included species.

Pyrrhalta alishanensis sp. nov.; P. igai Kimoto, 1981; P. meifena Kimoto, 1976; and P. meihuai sp. nov.

Diagnosis.

Medium to large sized species (5.6-8.7 mm). Antenna stout, antennomeres VII-X shortest (1.5-2.2 × longer than wide), III-VI similar or slender. Body convex. Elytra relatively broad, 1.4-1.6 × longer than wide. Aedeagus apically tapering and symmetric (Figs 16C, 20C, 22C) except P. meihuai sp. nov. (Fig. 20C), ostium obliquely longitudinal and lacking cover; endophallic sclerites composed of primary sclerite with several teeth at apex in P. igai (Fig. 19C) and P. meifena (Fig. 20C), with one secondary sclerite in P. meihuai sp. nov. (Fig. 22C, D) or two secondary sclerites in P. alishanensis sp. nov. (Fig. 16C, D) Ventrite VIII in females apically sclerotized, apical margin widely rounded and with dense short setae; spiculum long (Figs 16E, 19E, 20E, 22E). Gonocoxae apically sclerotized and longitudinal, with dense, long setae along lateral and apical margins (Figs 16I, 19I, 20I, 22F). Apical margin of abdominal ventrite V with one pair of rounded ridges at middle and slightly concave between ridges in males (Figs 16H, 19H, 20H, 22I); widely rounded in females (Figs 16G, 20G, 22H) except concave in those of P. igai (Fig. 19G). Mesotibia lacking apical spine in males and tarsomere I not modified.

Biology.

Larvae and adults feed on leaves of Acer species ( Sapindaceae).