Trachylophus tianmuensis sp. nov.

(Figs. 3–4).

Adults (Fig. 3). Male. Body length: 28.0mm, wide 12.5mm. Body reddish to yellowish brown, antenna, pronotum, elytra, abdominal surface and legs covered with short golden pubescence.

Head with a groove between upper eye-lobes; vertex with a fairly deep groove between antennal insertions and with a smooth ridge on each side of raised areas; frons deeply impressed on each side. Antenna slightly longer than body in males, 3 rd segment longer than 4 th and subequal to 5 th antennal segment; antennomeres with flattened margin laterally from 5 th segment and 5 th to 10 th antennal segment internally spined at apex; Prothorax slightly broad than longer, obtusely convex at side, lacking lateral tubercles; disc with vermicular ridges (Fig. 3C). Scutellum lingulate. Elytra parallel on both sides and weakly narrowed posteriorly; apex narrowed externally moderately obliquely emarginated with strong sutural spines, but without outwardly turned tooth at outer angle. First hind tarsal segment shorter than next two combined. Prosternal intercoxal process with rounded tuberculate (Figs. 3D & E).

Male genitalia (Fig. 4). Tegmen moderately curved in profile, 2.5 times as long as wide; Parameres short, with length about same as basal width, covered with brown setae, with longer and sparse setae apically (Fig. 4A). Median lobe slightly curved. Median struts slender, 1/2 times as long as whole median lobe in length; ventral plate longer than dorsal plate, median foramen rounded. Endophallus moderately thin and long, followed by an ejaculatory duct (Fig. 4B). Tergite VIII wider than long, apex emarginated; densely covered with short brown setae apically. Spiculum gastrale about 1.5 times as long as tergite VIII. Spiculum relictum about half of tergite VIII (Fig. 4C).

Etymology. The species name refers to the type locality.

Type material. Holotype: male, Mt. Tianmushan, Zhejiang, China, 18-VI-1984, leg. Ainong Zhou (SWU).

Distribution. China: Zhejiang.

Diagnosis. This species can be distinguished from congeners in smaller body size and shorter antennae in males (antennae only slightly longer than body in males). It is similar to T. sinensis but differs in broader tergite VIII and lack of lateral pronotal tubercle.