Macrolycus testaceicollis Pic, 1923

Macrolycus testaceicollis Pic, 1923: 10; Kleine (1925: 329); Kleine (1933: 6); Nakane (1967: 73). Macrolycus testaceicollis var. differens Pic, 1923: 10; Kazantsev (1993b: 52).

Material examined. Laos, 12 males, NE Laos, Phou Pan Mt. 1300–1900 m, 1.–15. v. 2010, C. Holzschuh (LMBC, SYSM) 1 male, Yunnan, Gaoligongshan, 1500–2500 m, 25.22N 98.49E, 17.–24. v. 1995, Vit Kuban (LMBC).

Distribution. Vietnam, Laos.

Remark: Some specimens from Laos and Gaoligongshan have more rounded apical structure at the apex of the median lobe of the aedeagus.

Macrolycus venustus sp. nov. (Figs 29, 45, 46, 54)

Type material. Holotype, male, China, Guangxi province, Xin’an, Maoershan, 25.–30. v. 2010, Tongbo etc. (SYSM).

Diagnosis. This species share similar coloration with M. aemulus and M. confusus, but can be distinguished from M. aemulus by the shape of the pronotum and aedeagus (Figs 29, 46). The apex of the aedeagus has a lamellar structure and the apical part does not expand in lateral view as in M. laetus (Fig. 45).

Description (holotype). Body small, dark brown; pronotum dark brown, elytra testaceous (Fig. 29). Head small, with flat antennal tubercles separated by a narrow groove. Antennae overlapping four fifths of elytra when inclined, antennomeres 3–11 with slender lamellae (Fig. 54), Pronotum covered by brown pubescence, anterior margin projected anteriad, posterior angles acute, lateral margin sinuate (Fig. 29). Scutellum dark brown, straight posteriorly. Elytra subparallel, covered with testaceous pubescence, costa 3 inconspicuous, interstices with irregular punctures. Aedeagus without paramerae, slender; subapical part of aedeagus widened, constricted gradually distad; apex of aedeagus with narrow notch and ventrally inclined lamella (Figs 45, 46).

Measurements. Length 9.55 mm, width at humeri 2.15 mm, pronotum length/width 1.40/1.65 mm.

Distribution. China (Guangxi), known only from the type locality.

Etymology. The specific name refers to the elegant appearance of the holotype.