Macrolycus unicolor Y. Yang, Liu & X. Yang sp. nov.

Figures 5E, 6B, 7F-H, 8A, B

Type material.

Holotype: China • ♂ (IZAS); Yunnan, Tengchong; 20.V.2006; H.B. Liang leg.

Description.

Male (Fig. 6B). Length 8.2 mm, width at humeri 1.7 mm. - Body brown. Pronotum, elytra and scutellum orange. Surface covered with decumbent orange pubescence. - Head relatively small. Eyes small, interocular distance approximately twice as large as eye diameter. Antennae (Fig. 5E) flabellate, overlapping two-thirds the length of the elytra when inclined. Antennomere II transverse; III-XI lamellate, lamella of III 0.8 times as long as the joint itself, and lamella of VIII longest, 4.0 times longer than the joint itself. - Pronotum quadrate, 1.14 times wider than long, disc present with a median longitudinal keel extending from anterior margin to middle part. Anterior margin approximately straight, lateral margins subparallel and posterior margin bisinuate; anterior angles obtuse, posterior angles sharp and prominently projected. Scutellum trapezoidal, feebly emarginate at apex. - Elytra slender and subparallel, 3.2 times longer than humeral width. Each elytron with four costae, costa II stronger than the others; costa III visible only at basal part. - Aedeagus: median lobe slender, strongly curved near middle in lateral view, at an angle of ca. 120° between basal and apical parts of dorsal side, strongly arcuate at base part, subapical part strongly inflated dorsally (Figs 7H, 8A); naerly straight at basal part in ventral view, subapical part strongly inflated laterally and asymmetrical (Figs 7F, G; 8B), with an oval ventral cavity (Fig. 7G); apical part parallel-sided (Fig. 7F, G), with a deep V-shaped notch at apex (Fig. 7G).

Female.

Unknown.

Diagnosis.

This new species resembles M. atronotatus in appearance but differs from the latter in the uniformly orange pronotum (Fig. 6B), with a black patch on the pronotum (Fig. 3A) in M. atronotatus . Additionally, it is similar to M. atronotatimimus sp. nov. in the lateral view of the median lobe (Fig. 8A) but differs from the latter in the ventral view (Fig. 8B), which is feebly curved at the basal part, at an angle of ca. 15° with the apical part, with the subapical part asymmetrically inflated (Fig. 7G). In comparison, the median lobe of M. atronotatimimus sp. nov. is moderately swollen and straight at the basal part in ventral view (Fig. 4K).

Etymology.

The specific name is derived from the Latin " uni -" (single) and " color " (hue), referring to its uniformly orange pronotum.

Distribution.

China (Yunnan).