Sinoxylon luzonicum Lesne, 1932 (Figs 19E&F)

Sinoxylon luzonicum Lesne, 1932a: 393.

Type material examined: Sinoxylon luzonicum ST (MNHN).

Diagnosis. Stout, entirely dark red or black. Scutellum medium to large, smooth and shiny. Elytra completely glabrous, elytral declivity granulate, with 3 pairs of marginal tubercles, shinny granulate carinulae. Declivital suture raised, granulate, juxtasutural spines small, inserted above or in the middle level of the declivity and next to the outer side of the raised suture, short, conical, inner side flat, shinny, granular at the base of outer side, tip smooth, not sharp.

BODY stout, parallel-sided, length 5mm, about 2.2–2.5 times as long as wide. Entirely dark red or black, abdomen with reddish margin, femora and tibiae black, tarsi reddish brown, antennae and palps brownish.

HEAD Antennal club matt with fine, extremely short and sparse setae; the 1 st club antennomere about 4 times as wide as long, 2 nd club antennomere 5–6 times as wide as long, the 3 rd club antennomere dilated gradually toward apex. Eyes small to medium sized, raised posteriorly. Frons quadridentate, sparse granulate; some short, erected setae and very few long, erected setae on sides. Fronto-clypeal suture distinct with a small glabrous area in middle. Clypeus very sparse granulose with sparse, short, erected setae, anterior margin wide arch to straight (Fig. 10).

PRONOTUM wider than long, densely granulate, anterior angle with a slightly uncinate tooth, lateral margins very slightly curved except close to the posterior angles, which are granulose; posterior area of pronotum with dense elongate appressed granules, slightly raised laterally. Vestiture of very short, very sparse setae, dense and longer anteriorly and laterally.

SCUTELLUM medium to large, subrectangular, rounded posteriorly, smooth and shiny.

ELYTRA completely glabrous, cariniform basal margin, strongly densely punctured, attenuated anteriorly, becoming subcarious and vermiculate posteriorly. Humeral callus smooth and shining. Elytral declivity punctures large, well separated, gradually smaller toward apex, granulate, with 3 pairs of marginal tubercles, shinny granulate carinulae. Declivital suture raised, granulate, juxtasutural spines small, inserted above or in the middle level of the declivity and next to the outer side of the raised suture, short, conical, inner side flat, shinny, granular at the base of outer side, tip smooth, not sharp. Sutural angle simple or slightly reflexed. Post-epipleuron gradually widen beneath the middle of elytra toward apex.

LEGS Posterior tibiae with some short, semierect hairs on the outer face.

Geographical distribution: Philippines (Luzon). New records: Malaysia, Perak, 25km NE of IPOH, 1200m, Banjaran Titi Wangsa mts, Korbu mt., 11–16,i,1999, leg. P Cechovsky (2, LLY).

Biology: unknown.

Remarks: Lesne (1932a) pointed out that the species resembles S. bufo. The author examined the specimens collected from Malaysia with the juxtasutural spines very small and inserted about upper 1/3 of elytral declivity and the syntype collected from Philippines with the juxtasutural spines larger and 2/5 upper of elytral declivity.