Macroscytus japonensis Scott, 1874

Zhu, Geng-Ping, Liu, Guo-Qing & Lis, Jerzy A., 2010, A study on the genus Macroscytus Fieber, 1860 from China (Hemiptera: Heteroptera: Cydnidae), Zootaxa 2400, pp. 1-15 : 9-10

Macroscytus japonensis Scott, 1874

( Fig. 6 )

Aethus badius: Walker 1867: 159 [syntype from North China].

Macroscytus japonensis Scott, 1874: 289 [name only], 294; Lis 1994: 221, 2000: 429. Macroscytus niponensis Signoret, 1883: 475 (syn. by Horváth 1919: 241).

Macroscytus subaeneus: Wu 1935: 269 ; Hsiao et al. 1977: 46 [part]; Zhang and Lin 1992: 108. Macroscyrtus [sic!] subaenus [sic!]: Lin and Zhang 1992: 218.

Diagnostic characters: Body length: 8.10–10.5 mm, body width: 4.65–6.00 mm. General body colour from castaneous to almost black. Head almost impunctate, its lateral parts sometimes wrinkled and with a few punctures; clypeus without a subapical pair of hair-like setae; each paraclypeus submarginally with a single preocular hair-like seta ( Fig. 6 a); 3rd antennal segment 1.09–1.19 times longer than 2nd; ocular index 1.98– 3.00; interocellar index 5.5–9.1. Pronotal transverse impression behind calli absent, or only slightly marked on either side and interrupted medially; lateral margins with 5–6 submarginal setigerous punctures ( Fig. 6 a). Propleural depression with a row of coarse punctures, propleural anterior convexity moderately punctate, posterior convexity with large punctures. Exocorium densely punctate; mesocorium with puncturation weaker than that of exocorium; costa separated from exocorium along almost its entire length; costal margin with 2 setigerous punctures. Male hind tibiae slightly carinate, and subbasally with distinct small tubercles, hind femora with several small teeth on its ventral margin and one subapical tooth on dorsal margin ( Fig. 6 b); female hind femora without teeth, and hind tibiae without tubercles. Abdominal sterna with patches of punctures posteriorly to spiracles. Opening of male genital capsule as in Fig. 6 d, its margins completely sclerotized; paramere as in Fig. 6 c; aedeagus as in Fig. 6 e; apical part of the 2nd conjunctival appendages laterally curled.

Material examined: CHINA: Guizhou Province: Daozhen county (28°53'N, 107°36'E), alt. 600m, 24.v.2004, 2 females, Wei-bing Zhu leg.; Maolan county (27°39'N, 108°96'E), alt. 900m, 1 male, 1.viii.1999, Wen-jun Bu leg.; Hainan Province: Mt. Diaoluo, Lingshui county (18°66'N, 109°93'E), alt. 70m, 1 male, 28.v.2007, light-trapped, Xu Zhang leg., 1 female, 2.vi.2007, light-trapped, Ji-meng Hua leg., 1 female, 28.v.2007, light-trapped, Xiao-ming Li leg.; Duowenling (19°80'N, 109°77'E), 1 male, 1 female, 2.v.2009, light-trapped, Gengping Zhu leg.; Hubei Province: Wuchang county (30°21'N, 114°18'E), 1 male, viii.1982; Yichang county (30°46'N, 111°19'E), 1 male, vii.1985, 1 female, 9.v.1985, 2 females, 28.v.1986, Chuan-ren Li leg.; Shizi mountain (25°32'N, 102°22'E), 2 males, 20.v.1980, 3 males, 1 female, 15.x.1990.; Sichuan Province: Chengdu (30°40'N, 104°04'E), 1 male, vi.1956; Wulong county (29°19'N, 107°43'E), 2 females, vii.1958; Yunnan Province: Jinping county (22°47'N, 103°12'E), alt. 500m, 8 males, 8 females, 20.iv.1956, 1 female, 19.iv.1956, Ke-ren Huang leg.; Hekou county (22°31'N, 103°59'E), 1 male, 9.vi.1956, 1 male, 7.vi.1956, 1 female, 10.vi.1956, Ke-ren Huang leg.; Zhejiang Province: Mt. Tianmu (30°26'N, 119°34'E), 1 male, 2.vii.1972, Zi-Qing Wang leg., 1 male, 8.vii.2007, light-trapped, Geng-ping Zhu leg.

Distribution: China (Beijing, Fujian, Gansu, Guangdong, Guizhou, Hainan, Henan, Hubei, Hunan, Shandong, Shanghai, Shanxi, Sichuan, Taiwan, Yunnan, Zhejiang), Burma (north), Korea, Japan, Russia (Far East), Vietnam (north).

Note: The species is very similar to M. fraterculus , but can be separated from the latter by the characters given in the key to species.

Figures

FIGURE 6. Macroscytus japonensis from China. (a) body outline; (b) male hind leg, dorsal view; (c) left paramere; (d) male genital capsule, dorsal view; (e) aedeagus. Scale bar = 0.25 mm.