Macroscytus vietnamicus J.A. Lis 1994

Macroscytus vietnamicus J.A. Lis, 1994

(Fig. 8)

Macroscytus vietnamicus J.A. Lis, 1994: 234, 2000: 486.

Diagnostic characters: Body length: 8.86–10.19 mm, body width: 4.55–5.65 mm. General body colour from dark castaneous to black. Head dorsally with several small almost indistinct irregularly scattered punctures; clypeus subapically without a pair of hair-like setae; each paraclypeus with 2 submarginal setigerous punctures (Fig. 8 a); 3rd antennal segment 1.32–1.56 times longer than the 2nd; ocular index 2.10–2.23; interocellar index 6.6–10.4. Pronotal transverse impression behind calli distinctly developed, sometimes interrupted medially (Fig. 8 a); lateral margins with 4–5 submarginal setigerous punctures (Fig. 8 a). Propleural depression densely coarsely punctate, its posterior and anterior convexities sparsely punctate. Mesocorial disc almost evenly punctate; exocorium densely punctate; costa narrow, moderately convex, separated from exocorium almost along its entire length; costal margin with 2 setigerous punctures (Fig. 8 a). Hind male femora with several distinct teeth and tubercles, hind tibiae with distinct subbasal tooth (Fig. 8 c). Abdominal sterna III–VI distinctly punctate in lateral two-thirds. Dorsal view of male genital capsule as in fig. 8d, its opening margins completely sclerotized; paramere as in Fig. 8 e; aedeagus as in Fig. 8 f, its ductus seminis and 2nd conjunctival appendages long.

Material examined (paraclypeus with two submarginal setigerous punctures): CHINA: Hainan Province: Jianfengling National Nature Reserves, Ledong County (41°15'N, 117°12'E), 1 female, 3.v.1964, Sheng-li Liu leg., 1 female, 3.v.1964, Si-kong Liu leg.; Bawangling National Nature Reserves, Changjiang county (41°15'N, 117°12'E), 1 male, 4.iv.2008, light-trapped, Geng-ping Zhu leg., 1 female, 3.iv.2008, lighttrapped, Bo Cai leg.; Mt. Diaoluo, Lingshui county (18°66'N, 109°93'E), alt. 70m, 1 male, 28.v.2007, lighttrapped, Xiao-ming Li leg., 1 female, 28.v.2007, light-trapped, Peng-zhi Dong leg., 1 female, 27.v.2007, lighttrapped, Xin Yu leg., 1 female, 19.iv.2008, light-trapped, Bo Cai leg.; Datian Cervus eldi National Nature Reserve (19°11'N, 108°80'E), alt. 100m, 1 male, 6 females, 25.iv.2009, Geng-ping Zhu leg., 2 males, 2 females, 25.iv.2009, Geng-ping Zhu,Yi-ran Mu leg., 1 male, 8 females, 26.iv.2009, light-trapped, Xi Li leg., 4 males, 6 females, 27.iv.2009, light-trapped, Yi-ran Mu leg., 10 males, 14 females, 27.iv.2009, light-trapped, Geng-ping Zhu leg., 9 males, 13 females, 28.iv.2009, light-trapped, Geng-ping Zhu, Yi-ran Mu leg., 1 male, 28.iv.2009, light-trapped, Geng-ping Zhu leg., 1 male, 5 females, 29.iv.2009,light-trapped, Yi-ran Mu leg.; Duowen (19°46'N, 109°46'E), 1 female, 3.v.2009, light-trapped, Geng-ping Zhu leg.; Wuzhishan county (18°89'N, 109°67'E), 1female, 13.iv.2009, light-trapped, Yi-ran Mu leg.; Maoyang Town (18°94'N, 109°52'E), 3 males, 4 females, 18.iv.2009, light-trapped, Geng-ping Zhu leg., 2 males, 6 females, 18.iv.2009, light-trapped, Yi-ran Mu leg., 2 males, 3 females, 18.iv.2009, light-trapped, Yi-ran Mu, Ke-long Jiao leg.; (paraclypeus with three or four submarginal hair-like setae): CHINA: Hainan Province: Datian Cervus eldi National Nature Reserve (19°11'N, 108°80'E), alt. 100m, 1 female, 26.iv.2009, light-trapped, Li Xi leg., 1 female, 27.iv.2009, light-trapped, Yi-ran Mu leg., 2 males, 1 female 27.iv.2009, light-trapped, Geng-ping Zhu leg., 2 males, 28.iv.2009, light-trapped, Geng-ping Zhu, Yi-ran Mu leg.

Distribution: China (Hainan) – new country record, Burma, India, Laos, Thailand, Vietnam. Note: During our study, we have found that some specimens bear three or four submarginal hair-like setae on each paraclypeus (Fig. 8 b) (typical specimens possess only two setae – Fig. 8 a).