Phygasia chengi Lee, new species

(Figs 1–3, 7–9, 14, 17, 20, 23, 26)

Phygasia ornata: Maulik, 1926: 413 (misidentification); Chûjô, 1936: 18 (part); Kimoto, 1971: 78; Kimoto, 1987: 192; Kimoto, 1989: 269; Kimoto, 1991: 24 (part); Kimoto & Chu, 1996: 121 (catalog); Lee & Cheng, 2007: 143 (catalog). Phygasia ornata diluta: Kimoto, 1966: 35 (part).

Description. Male. Length 7.3–7.9 mm, width 3.7–4.2 mm. General color yellowish-brown; antennomeres III-XI, tibia, tarsus black; elytron black, with one big transverse white band at middle, almost connected with each other at suture (Fig. 1), apex orange. Pronotum about 1.9 times wider than long, disc smooth, with scattered fine punctures. Elytra 1.4 times longer than wide, lateral margin slightly rounded, widest just behind middle, disc with densely distributed small punctures and randomly occurring large punctures.

Antenna (Fig. 7) with antennomeres III-VII widened; ratio of length of antennomeres III to XI about 1.0: 1.2: 1.3: 1.2: 1.2: 1.1: 1.1: 1.1: 1.4, ratio of length to width of antennomeres III to XI about 1.4: 1.7: 1.9: 1.8: 2.0: 2.3: 2.8: 3.1: 4.8. Penis (Figs 14a, b) wide, about 3.9 times longer than wide, apex of tectum a little lower than that of penis, subparallel-sided, strongly narrowed subapically, apex rounded, moderately curved in lateral view; ventral side evenly convex.

Female. Length 6.8–8.1 mm, width 3.5–4.3 mm. Antennomeres III-VI narrower (Fig. 9), ratio of length of antennomeres III to XI about 1.0: 1.1: 1.2: 1.1: 1.1: 1.1: 1.0: 1.0: 1.3, ratio of length to width of antennomeres III to XI about 1.9: 2.2: 2.4: 2.2: 2.4: 2.5: 2.5: 3.1: 4.9. Gonocoxa (Fig. 17) medially connected, apex widely rounded, base weakly sclerotized, two long setae at tip, three or four long setae at outer side. Spiculum of sternite VIII (Fig. 23) relatively shorter than P. ornata and P. d i l u t a. Spermatheca (Fig. 20) with receptacle strongly swollen; pump strongly curved, apex rounded; proximal spermathecal duct wide. Bursa-sclerites absent.

Variation. Some individuals in high mountains have smaller white spots on the elytra (Figs 2–3) and wider antenna (Fig. 8) in males (ratio of length to width of antennomeres III to XI about 1.2: 1.4: 1.6: 1.6: 1.8: 1.9: 2.1: 2.1: 3.3).

Diagnosis. See diagnosis of Phygasia ornata .

Types (117 specimens). Holotype 3: Hsinchu, Wuchihshan, 14.V.2008, leg. S.-F. Yu (TARI). Paratypes: 33, 5ƤƤ, same as holotype (TARI); 13, 1Ƥ, Shinchiku (= Hsinchu city), 1–30.VII.1918, leg. J. Sonan (TARI); 1Ƥ, Hsinchu, Lupi, 20.VII.2008, leg. M.-H. Tsou (TARI); 1Ƥ, Hsinchu, Seto (= Wufeng), 21.VII.1935, leg. M. Chujo (TARI); 1Ƥ, same locality, 14–16.VII.1982, leg. K. C. Chou & C. C. Pan (TARI); 23, 2ƤƤ, same locality, 15.V.2008, leg. H. Lee (TARI); 1Ƥ, Ilan, Chinyang, 23.X.2011, leg. S.-I. Tsai (TARI); 13, Ilan, Shikigun (= Ssuchi), 22.V.1931, leg. R. Takahashi (TARI); 23, same locality, 1.VIII.2009, leg. M.-H. Tsou (TARI); 1Ƥ, Ilan, Ssuyuanyakou, 30.VI.2008, leg. M.-H. Tsou (TARI); 1Ƥ, Ilan, Taiheizan (= Taipingshan), VI.1930, leg. S. Minowa (TARI); 1Ƥ, same locality, V.1935, leg. Y. Miwa (TARI); 1Ƥ, same locality, 10.VII.1940, leg. R. Matsuda (TARI); 1Ƥ, same locality, 10.V.1942, leg. R. Tanaka (TARI); 13, 1Ƥ, Ilan, Tsuifenghu, 15.VIII.2007, Y.-C. Chang (TARI); 23, 1Ƥ, Miaoli, Hohsinglinchang, 1.V.2008, leg. H. Lee (TARI); 1Ƥ, Nantou, Huakang, 13.IX.2010, leg. C.-F. Lee (TARI); 2ƤƤ, Nantou, Lushan, 27–32. V.1980, leg. K. S. Lin & L. Y. Chou (TARI); 23, 2ƤƤ, Nantou, Meifeng, 17.VI.2010, leg. C.-F. Lee (TARI); 13, same locality, 17–22.VI.1979 (TARI); 23, 1Ƥ, same locality, 8.VI.1980, leg. K. S. Lin & B. H. Chen (TARI); 13, same locality, 26.VIII.1980, leg. K. S. Lin & C. H. Wang (TARI); 1Ƥ, same locality, 24–26.VI.1981, leg. K. S. Lin & W. S. Tang (TARI); 1Ƥ, same locality, 28– 29.VIII.1981, leg. L. Y. Chou & S. C. Lin (TARI); 13, same locality, 31.VIII–2.IX.1982, leg. L. Y. Chou & K. C. Chou (TARI); 13, Nantou, Baibara (= Meiyuan), 4–7.VII.1939, leg. Y. Miwa (TARI); 13, Nantou, Nanshanchi, 8.VI.1965, leg. B.-S. Chang (NMNS); 13, Nantou, Puli, 16–19.V.1956, leg. K. S. Lin (TARI); 13, 1Ƥ, Nantou, Tattaka (= Sungkang), 24.V.1927, leg. K. Fukuda (TARI); 23, Nantou, Tsuifeng, 27.VIII.1981, leg. L. Y. Chou & S. C. Lin (TARI); 13, Nantou, Tungpu, 25–29.IX.1980, leg. L. Y. Chou & T. Lin (TARI); 13, same locality, 28.IV– 2.V.1981, leg. T. Lin & C. J. Lee (TARI); 1Ƥ, same locality, 5–8.X.1981, leg. T. Lin & W. S. Tang (TARI); 1Ƥ, same locality, 20–24.VI.1983, leg. K. C. Chou & C. Y. Wong (TARI); 13, Nantou, Wanfengtsun, 10.VII.2007, leg. M.-H. Tsou (TARI); 13, 2ƤƤ, same locality, 13.IV.2010, leg. W.-T. Liu (TARI); 2ƤƤ, Nantou, Musha (= Wushe), 18.V–15.VI.1919, leg. T. Okuni (TARI); 13, same locality, 22.V.1927, leg. K. Fukuda (TARI); 1Ƥ, same locality, 25.VI–5.VII.1947, leg. Maa, Chen, & Liu (TARI); 13, same locality, 23–28.VI.1981, leg. K. S. Lin & W. S. Tang (TARI); 23, same locality, 26–28.VIII.1981, leg. L. Y. Chou & S. C. Lin (TARI); 13, 1Ƥ, same locality, 14.VII.1982, leg. S. C. Lin & C. N. Lin (TARI); 13, same locality, 30.VIII–2.IX.1982, leg. L. Y. Chou & K. C. Chou (TARI); 13, same locality, 7–8.X.1982, leg. K. C. Chou (TARI); 13, Taichung, Chiapaotai, 14–18.X.1980, leg. K. S. Lin & C. H. Wang (TARI); 1Ƥ, Taichung, Lishan, 26.VI.1979, leg. K. S. Lin & L. Y. Chou (TARI); 13, Taichung, Tachien, 2.IX.1987, leg. I.-C. Hsu (NMNS); 1Ƥ, Taichung, Wuling, 21.VI.1979, leg. K. S. Lin & B. H. Chen (TARI); 3ƤƤ, same locality, 27–29.VI.1979, leg. K. S. Lin & L. Y. Chou (TARI); 33, 5ƤƤ, same locality, 30.VI.2008, leg. M.-H. Tsou (TARI); 13, same but with “leg. S.-F. Yu” (TARI); 33, 1Ƥ, Taichung, Wushihkeng, 13.VII.2008, leg. C.-F. Lee (TARI); 1Ƥ, same but with “leg. M.-H. Tsou” (TARI); 13, 2ƤƤ, Tainan, Kuangtyling, 30.IX.1955, leg. S. C. Chiu (TARI); 13, 1Ƥ, Taihoku (= Taipei, City), IX.1911, leg. I. Nitobe (TARI); 1Ƥ, same locality, 2.IV.1933, leg. M. Chujo (TARI); 13, same locality, 25.V.1933, leg. Y. Miwa (TARI); 1Ƥ, same locality, X.1935 (TARI); 13, Taipei, Hsikenglinao, 3.VII.2010, Y.-L. Lin (TARI); 13, 1Ƥ, Taipei, Pinglin, 6.V.2007, leg. S.- F. Yu (TARI); 1Ƥ, Taipei, Ssushoushan, 4.VII.2004, leg. H.-T. Cheng (TARI); 13, Taipei, Urai (= Wulai), 20.IV.1930, leg. M. Chujo (TARI); 23, 1Ƥ, same locality, 24.VI.1933, leg. K. Kobayashi (TARI); 1Ƥ, same locality, 25.V.2007, leg. H.-J. Chen (TARI); 23, 2ƤƤ, Taitung, Motien, 5.X.2010, leg. C.-F. Lee (TARI); 13, Taoyuan, Paling, 18.VII.1980, leg. B.-S. Chang (NMNS); 13, Taoyuan, Ssuleng, 30.VIII.2008, leg. M.-H. Tsou (TARI).

Etymology. This new species is named after Mr. Hsing-Tzung Cheng of TCRT, who collected the first specimens.

Host plants. Asclepiadaceae: Dregea volubilis (L. f.) Benth., Heterostemma brownii Hayata, Marsdenia formosana Masam., M. tinctoria R. Brown, Cynanchum boudieri H. Lev. & Vaniot.

Distribution. North Taiwan (Fig. 26). In south of Kuantyling (Tainan county), it is sympatric with Phygasia diluta . It is widespread from lowlands to high mountains of about 2500 m.