Tsouchya mediofasciata (Kimoto, 1976) Lee, 2020

Lee, Chi-Feng, 2020, Revision of Taiwanese species of Atrachya Chevrolat, 1836 (Coleoptera, Chrysomelidae, Galerucinae): descriptions of three new genera, two new species, and designations of three new synonyms, ZooKeys 940, pp. 117-159 : 117

Tsouchya mediofasciata (Kimoto, 1976) comb. nov.

Atrachya mediofasciata Kimoto, 1976: 6; Kimoto 1989: 257 (additional records); Kimoto 1991: 15 (additional records).

Monolepta tsoui Lee, 2009: 23. syn. nov.

Monolepta bicavipennis : Kimoto, 1969: 50 (Taiwan). non Monolepta bicavipennis Chen, 1942.

Types.

Atrachy mediofasciata . Holotype ♂ (OMNH): "[Taiwan] / Meifeng (梅峰) / Nantou Hsien [h, w] // 26.VI.1971 / Y. Miyatake [h, w] // Atrachya / mediofasciata / Kimoto, n. sp. [h, w] // HOLOTYPE [p, r] // (Redg. O.M.N.H.) [p, w]". Paratypes: 1♀ (KMNH): "(Taiwan) / Fenchihu (奮起湖), 1400m / Chiayi Hsien [p, w] // 7[h].vii.1965 / Y. Kurosawa [p, w] // Japan-U. S. / Co-op. Sci / Programme [p, y] // PARATYPE [p, b] // Atrachya / mediofasciata / Kimoto, n. sp. [h, w]"; 1♀ (KMNH): "(Taiwan) / Alishan (阿里山), 2300m / Chiayi Hsien [p, w] // 6[h].vii.1965 / Y. Kurosawa [p, w] // Japan-U. S. / Co-op. Sci / Programme [p, y] // PARATYPE [p, b] // Atrachya / mediofasciata / Kimoto, n. sp. [h, w]".

Other material.

Kaohsiung: 1♂, 2♀♀ (KMNH), Shik Shan (石山), near Liu Kui (六龜), 9.VIII.1986, leg. K. Baba; Nantou: 1♂ (KMNH), Chun Yan (春陽), 7.X.1986, leg. K. Baba; 1♂ (NMNS), Juiyenhsi (瑞岩溪) Station, 29-30.VIII.2009, leg. H.-H. Liang; 1♂ (NMNS), same but with “12.VII.2007”; Taichung: 1♀ (NMNS), Tasheishan (大雪山) Forest Road 32km, 16.VIII.2008, leg. Liang, Chen, & Fu; 2♀♀ (BPBM), Hassenzan (= Pahsienshan, 八仙山), 23.VI.1934, leg. J. L. Gressitt, both specimens were identified as Monolepta bicavipennis Chen ( Kimoto 1969).

Remarks.

This species is described in detail as Monolepta tsoui by Lee (2009). Color patterns of this species are extremely variable. Typical individuals have a yellowish brown body, with wide black bands along the lateral margins and suture of elytra (Fig. 13A ), blackish brown antennae, except two basal antennomeres, tibiae, tarsi, metasternum, metepisternum, and epimera yellowish brown. Some have a more yellowish body color (Fig. 13B, C ) but with blackish brown antenna, tibiae, and tarsi as typical form. Different degrees of variation exist between both forms, such as slender back stripes along the margin of the elytra (Fig. 13D ). Some are similar to the typical form, but the elytra are entirely black (Fig. 13E ). Some are entirely black except the yellowish brown abdomen (Fig. 13F, G ). In addition, two color patterns have not been studied previously. One is similar to the typical form but with the elytra black except one transverse white band (Fig. 13H ). It was described as Atrachya mediofasciata . The other is also similar to the typical form but the elytra black apically (Fig. 13I ). In addition, two specimens misidentified as Monolepta bicavipennis have a characteristic color pattern: yellowish brown body but head and prothrax blackish brown, tibiae darker.

Figures

Figure 13. Habitus of Tsouchya mediofasciata A female, from Shihshan trail (石山林道), dorsal view B male, from Lilungshan (里龍山), dorsal view C same, ventral view D female, from Lilungshan (里龍山), dorsal view view E male, from Shihshan trail (石山林道), dorsal view F female, from Shihshan trail (石山林道), dorsal view G same, dorsal view H male, from Talu trail (大鹿林道), dorsal view I female, from Meifeng (梅峰), dorsal view.